Other Ending Letters

Word Lengths Starting With F

All 774 Matching Words

faal(Yorkshire) Ugly; foul; evil.fabellotibial(anatomy) Relating to a fabella and a tibiafacadalRelating to a facade.facefulAn amount that fills or covers the face.facemail(computing, technology) Face-to-face communication, as opposed to other non-personal forms of communication.facetalRelating to a vertebral facetfacial(relational) Of or affecting the face.facilObsolete spelling of facile.facioauriculovertebral(anatomy) Relating to the face, ears, and vertebrae.faciobrachial(anatomy) Relating to the face and arm.faciocervical(anatomy) Relating to the face and the neckfaciocutaneoskeletal(medicine) Affecting the face, skin, and skeleton; applied to Costello syndrome.faciodigitogenital(medicine) Pertaining to the face, fingers and genitals.faciogenitalAffecting the face and genitals.faciohypoglossal(anatomy) Of or relating to the facial and hypoglossal nerves.faciolingualRelating to the face and tongue.facioscapulohumeral(anatomy) Relating to the face, scapula, and upper arms; applied to a form of muscular dystrophy.factfulfactually accuratefactial(philosophy) Of or relating to factiality.facticalfactic; factualfacticidalRelating to facticide.factionalOf, pertaining to, or composed of factions.factitialproduced artificially or unintentionally; factitious.factorial(mathematics) Of or pertaining to a factor or factorial.factualPertaining to or consisting of objective claims.faecal(Commonwealth) Alternative spelling of fecal.fahlAlternative form of faal.fail(intransitive) To be unsuccessful.failgirlSynonym of girlfailure.faintfulDisplaying weakness, frailty, or faintness; fainting; dejectedfaithfulLoyal; adhering firmly to person or cause.faithfullArchaic spelling of faithful.fakecel(incel slang, derogatory, offensive) One who claims to be incel, despite having had success in romance.fakeful(rare) Full of fakeness; disingenuousfakemail(Internet) Email whose sender or other information has been faked.falObsolete spelling of fall.falafel(uncountable) A Middle Eastern food in the form of balls made from chickpeas or broad beans and other ingredients, often served in a pita.falcarindiol(organic chemistry) An antifungal polyacetylene diol (3R,8S,9Z)-1,9-heptadecadiene-4,6-diyne-3,8-diol present in carrotsfalcarinolA natural polyacetylene pesticide and fatty alcohol found in carrots, red ginseng, and ivy.falcialOf or pertaining to a falx.falderalAlternative spelling of folderol.falderolAlternative form of folderol.faldstoolA portable, folding chair used by a bishop when away from his throne.falecalcitriol(pharmacology) An analogue of calcitriol.falintololA beta-adrenergic blocking drug.falipamil(pharmacology) A calcium channel blocker.fall(heading, intransitive) To be moved downwards.fallalA piece of ribbon worn as a streamer.falseful(obsolete) False.falsidical(logic) Having a false basis.falvopiridolMisspelling of flavopiridol.famil(travel) A free or low cost trip for travel agents or consultants, provided by a travel wholesaler or airline as a means of promoting their service.familialOf or pertaining to a human family.familicidalOf or pertaining to familicide.familisticalAlternative form of familistic.fampool(neologism) A carpool composed of members of the same family.fanal(obsolete) A lighthousefanapanelA quinoxalinedione drug that acts as a competitive antagonist of the AMPA receptor.fanaticalHaving an extreme, irrational zeal or enthusiasm for a specific cause.fancifulImaginative or fantastic; ignoring reality.fancifullArchaic form of fanciful.fangal(slang) A fangirl.fangfulHaving sharp or menacing fangs.fangirl(fandom slang) A female fan who is obsessive about a particular subject (especially, someone or something in popular entertainment media).fanmailAlternative form of fan mail.fannelfanon (religious garment)fannellObsolete form of fannel.fanonical(fandom slang) Of, pertaining to, or characteristic of fanon.fanpetalAny of various flowering plants of the genus Sida in the mallow family.fanpol(fandom slang, derogatory) A fan who habitually tries to control others' fannish activity.fantailAny of several birds, of the genus Rhipidura, from Asia, Australia and New Zealand.fantasmagoricalAlternative form of phantasmagorical.fantasmalAlternative spelling of phantasmal.fantasticalOf or pertaining to fantasy.fantroll(fandom slang) An internet troll who is part of a fandom.farcicalResembling a farce; ludicrous; absurd.fardelA fourth part: a quarter of anything.fardingdealObsolete form of farthingdale.farewellA wish of happiness or safety at parting, especially a permanent departure.farfelSmall pellet-shaped egg pasta in Ashkenazic Jewish cuisine, made instead out of matzah during Passover.farlAny such cake or bread, now especially an Irish speciality such as a soda farl or potato farl.farmaceutical(pharmacology, medicine) A medically valuable compound produced from modified agricultural crops or animals (usually through biotechnology).farmgirlA girl or young woman who works on a farm, especially one who is growing up there as a child of the farmer.farmstall(South Africa) A shop attached to a farm and selling its produce.farnesal(organic chemistry) The sesquiterpenoid aldehyde (2E,6E)-3,7,11-trimethyldodeca-2,6,10-trienal (or a geometric isomer)farnesol(organic chemistry) A sesquiterpene alcohol that is present in many essential oils and is involved in the biosynthesis of cholesterolfarnesyl(biochemistry) The univalent radical derived from farnesol.farnesylethyl(organic chemistry, especially in combination) A farnesyl derivative of an ethyl radicalfarrerol(organic chemistry) A phenolic chromenone based on (2S)-5,7-dihydroxy-2-(4-hydroxyphenyl)-6,8-dimethyl-2,3-dihydrochromen-4-onefartfulFull of farts; flatulent or characteristic of farts.farthel(obsolete) Alternative form of fardel (a bundle or burden)farthingdealAlternative form of farthingdale.fascialRelating to a fascia.fasciocidalThat kills liver flukes (of the genus Fasciola)fasciologicalRelating to fasciologyfasciomusculoskeletal(anatomy) fasciomuscular and skeletalfascioquinol(organic chemistry) Any of a group of bioactive meroterpenes present in an Australian sponge of the genus FasciospongiafascioscapulohumeralMisspelling of facioscapulohumeral.fascisticalSynonym of fascistic.faselObsolete form of phasel.fashional(informal) fashionablefasidotrilAn ACE inhibitor.faslInitialism of feet above sea level (“elevation”).fastballA high-speed pitch of a baseball.fastigialRelating to a fastigiumfasudil(pharmacology) A potent rho-kinase inhibitor and vasodilator.fatalCausing death or destruction.fatallObsolete spelling of fatal.fatefulMomentous, significant, setting or sealing one’s fate.fatidicalHaving power to foretell future events; prophetic; fatiloquent.faucalRelating to the fauces, or opening of the throat; faucial.faucial(anatomy) Pertaining to the fauces; pharyngeal.faultfulWith faults or sins; not perfect; flawed.faunalPertaining to animals.faunisticalAlternative form of faunistic.faunologicalRelating to faunology.fauxmosexual(slang) A heterosexual person who affects homosexual characteristics.favelyellow or dun in colourfaxeladol(pharmacology) A particular narcotic painkiller.feal(UK dialectal, Northern England, Scotland) (of things) Cosy; clean; neat.fearefullObsolete spelling of fearful.fearfulFrightening; causing fear.fearfullObsolete spelling of fearful.feastfulFestive; joyful; sumptuous; luxurious.featherfoilAn aquatic plant (Hottonia palustris) with finely divided leaves.feathertailA species of possum, (Distoechurus pennatus).featuralOf or pertaining to features.featureful(chiefly computing) Having many features.febantelA certain anthelmintic drug.febrifugal(pharmacology) Acting against or preventing fever.febuprolA choleretic drug.fecalOf or relating to feces.fecialAlternative spelling of fetial.feckful(Scotland, Northern English) Powerful, effective, efficient, vigorous.fecosterol(biochemistry) A sterol made by certain fungi and lichens.federalPertaining to a league or treaty; derived from an agreement or covenant between parties, especially between nations.federationalFederative; pertaining to, characteristic of, or constituting a federation.feedmillAlternative form of feed mill.feel(heading) To use or experience the sense of touch.feelingfulFull of feeling or emotion.feignfulFalse; feigned.felafel(less common) Alternative spelling of falafel.feldspathoidal(of a rock) Having feldspathoids.felicidalPertaining to felicide.felinologicalPertaining to felinology.fell(transitive) To make something fall; especially to chop down a tree.fellowfeel(transitive, obsolete, rare) To empathize or sympathize with.femalObsolete form of female.femcel(incel slang) A female incel.femerallAlternative form of femerell.femerell(historical) The lantern, louvre, or covering placed in the ridge of a hall roof for the purpose of ventilation or letting out the smoke of the fire kindled on a central hearth.femicidalKilling women.feminalOf or pertaining to women, femininity or feminismfeminicidalAlternative form of femicidal.feminological(very rare) Concerning or by means of feminology.femoralOf, pertaining to, or near the femur or thigh.femoroabdominal(anatomy) Relating to the femur and abdomen.femorocaudal(anatomy) Relating to the femur and the tail.femorocrural(anatomy) Relating to the thigh (or the femur) and the legfemorodistal(anatomy) distal to the thigh (or to the femur)femoropoplitealRelating to the femur and popliteus.femorotibialRelating to the femur and tibia.femtobecquerel(metrology) An SI unit of radioactive activity equal to 10⁻¹⁵ becquerels. Symbol: ffemtobel(metrology) An SI unit of relative power equal to 10⁻¹⁵ bels. Symbol: ffemtocell(telecommunications) A wireless communication system, smaller than a picocell, typically designed for use in a home or small business.femtokatal(metrology) An SI unit of catalytic activity equal to 10⁻¹⁵ katals. Symbol: ffemuralMisspelling of femoral.femurotibial(anatomy) Relating to, or connecting the femur and the tibiafenapanilA particular fungicide.fenarimolA fungicide that acts against rusts, blackspot and mildewfenbantelAlternative form of febantel.fencefulAs many as make up or line a fence.fenchol(organic chemistry) 1,3,3-trimethyl-2-norbornanol, a terpene and an isomer of borneol, used in perfumery.fenchyl(organic chemistry, especially in combination) A univalent radical derived from fencholfendosal(pharmacology) A nonsteroidal anti-inflammatory drug.fenestral(archaeology) A casement or window sash closed with cloth or paper instead of glass.fenestrel(pharmacology) A synthetic, non-steroidal estrogen developed as a postcoital contraceptive in the 1960s but was marketed.fenipentolA choleretic drug.fennelA plant, Foeniculum vulgare, of the parsley family, which has a sweet, anise-like flavor.fennellObsolete form of fennel.fenoterol(pharmacology) A beta 2 adrenergic agonist designed to open up the airways to the lungs.fenoxanilA particular fungicide.fenoxedil(pharmacology) A vasodilator.fenpentadiolAn antidepressant drug.fenpiclonilA particular fungicide.fentanilAlternative spelling of fentanyl; which is the international non-proprietary name.fentanyl(pharmacology) A synthetic opioid narcotic analgesic, C₂₂H₂₈N₂O, with pharmacological action similar to morphine that is administered transdermally as a skin patch and in the form of its citrate, C₂₂H₂₈N₂O·C₆H₈O₇, is administered orally or parenterally (as by intravenous or epidural injection); N-phenyl-N-[1-(2-phenylethyl)piperidin-4-yl]propanamide.fenyramidolA particular muscle relaxant.feodalArchaic form of feudal.fepradinolA topical antiinfective drug.feranimolMisspelling of fenarimol.ferial(ecclesiastical) Pertaining to an ordinary weekday, rather than a festival or fast.fermental(obsolete) fermentativefermentationalRelating to fermentation.fermentologicalRelating to fermentology.fernowlA European nightjar (Caprimulgus europaeus).ferrallisol(soil science) A ferritic lateritic soil.ferralosolAlternative form of ferralsol.ferralsolA type of soil, oxisol.ferrelAlternative form of ferrule.ferrilA metal cap on the butt end of a weapon shaft, often having a sharp point.ferrinol(medicine) A therapeutic preparation of iron and nuclein (a phosphorized protein) historically used in the treatment of anemia.ferrocenyl(chemistry, in combination) Derived from ferroceneferroelectricalAlternative form of ferroelectric.ferrogelA hydrogel, containing magnetite particles, that has unique magnetoelastic propertiesferrometalAny alloy that is rich in iron.ferronickelA ferroalloy of iron and nickel.ferrosol(soil science) A ferritic soil.ferrugineol(organic chemistry) The aliphatic alcohol 4-methyl-5-nonanol that is a weevil pheromoneferruginol(organic chemistry) A diterpene of the abietane chemical class that has been isolated from the needles of the redwood Sequoia sempervirens.ferryl(inorganic chemistry) describing compounds of iron in which it has a valence or oxidation number of +4.fertilObsolete spelling of fertile.fertilizationalRelating to fertilization.feruloyl(organic chemistry, especially in combination) A univalent radical formally derived from ferulic acidferumoxytolAn intravenous Fe₃O₄ preparation for treatment of anaemia resulting from chronic kidney disease.festalfestive, relating to a festival or feastfestivalPertaining to a feast or feast day; festive. (Now only as the noun used attributively.)fetal(embryology) Pertaining to, or connected with, a fetus.fetialConcerned with declarations of war and treaties of peace.feticidalKilling a fetus.fetofetal(medicine) Relating to, or communicating between two fetuses, especially twin fetuses; twin-to-twin.fetomaternal(medicine) Having to do with a fetus and its mother.fetopathologicalRelating to fetopathologyfetoplacentalOf or pertaining to both the fetus and the placenta.feudalOf, or relating to feudalism.feudatorialSynonym of feudatory.fewelObsolete spelling of fuel.fewl(Internet slang, leetspeak) Alternative spelling of fool (“foolish person”).fewnomial(mathematics) A polynomial with few monomials.fiberal(Internet slang, derogatory) Synonym of libtardfiberfill(US) A lightweight synthetic fiber used as insulation in clothingfibialOf or pertaining to the fibula.fibonomial(mathematics) Fibonacci-binomialfibral(especially mathematics) Having the form of a fiber or fibrilfibrational(algebraic topology) Of or pertaining to a fibration.fibrefillAlternative form of fiberfill.fibrilA fine fibre or filament.fibrisolA kind of organosol consisting predominantly of relatively undecomposed organic material with clearly visible plant fragments.fibroepithelial(anatomy) containing both epithelial and stromal or mesenchymal tissuefibroglialRelating to fibrogliafibrointimalfibrous and intimalfibrostromal(anatomy) fibrous and stromalfictionalInvented, as opposed to real.fictitional(rare) Synonym of fictional.fictocriticalRelating to fictocriticism.fictomercialA work of fiction featuring product placement or commissioned to promote a product.fidchellAn ancient Celtic board game somewhat resembling chess.fidicinal(music, archaic) stringed (of or pertaining to a stringed instrument).fiducialAccepted as a fixed basis of reference.fieldballA version of handball played by a team of up to eleven players outdoors.fieldfulA quantity that fills a field.fiendfulFull of fiendish arts or spirit.figmentalOf or relating to a figment.figuralRepresenting by means of a figure; emblematic.figurationalRelating to figurations.figurialRepresented by figure or delineation.filA Nordic dairy product, similar to yogurt, but using different bacteria which give a different taste and texture.filamentalRelating to, or composed of, filaments.filarial(medicine) Of or pertaining to the microscopic parasitic worms known as filaria, or an infestation thereof.filaricidalThat functions as a filaricidefilenadol(pharmacology) A chemical compound with antipain properties.filetailApplied to various kinds of fish characterized by tails with toothlike grooves.filial(not comparable) Pertaining to or befitting a son or daughter.filical(obsolete) Belonging to the former taxonomic class Filices (ferns).filicidalOf or pertaining to filicide.filioparental(rare) Between parent and child.fill(transitive, ergative) To make fullfillopodialMisspelling of filopodial.filmologicalRelating to filmology.filolamellipodialRelating to filolamellipodiafilopodial(cytology) Of, in or pertaining to the filopodia of a cellfiloviralRelating to filovirusesfilterwheelA device, attached to a microscope, that allows a variety of filters to be selectedfimbrial(anatomy) Of or pertaining to the fimbriaefinal(Canada, US, Philippines) A final examination; a test or examination given at the end of a term or class; the test that concludes a class.financialRelated to finances.finchbillAny of the birds in the genus Spizixos, found in Southeast Asia and China.fingerbowlAlternative spelling of finger bowl.fingerfulAn amount that can be or is held by a finger.fingernailThe hard, flat translucent covering near the tip of a human finger, useful for scratching and fine manipulation.fingernailful(rare) Enough to be stored under one's fingernail.fingerspell(transitive) To spell using fingerspelling.fingerstallA protective cover for the finger; a fingercot.fingertipfulThe amount of a substance that covers a person's fingertip.finial(figurative, also attributive) The completion or end of something.finicalFinicky, fastidious, overly precise or delicate.fipronil(organic chemistry) A broad-spectrum insecticide, belonging to the phenylpyrazole family, that disrupts the insect's central nervous system.fireballA ball of fire, especially one associated with an explosion, or (fiction, mythology) thrown as a weapon.firebell(firefighting) An alarm bell sounded in the event of a fire.firecallA call of fire alarm to a fire station.firedevilAlternative form of fire devil.firefallThe phenomenon whereby Horsetail Fall, a seasonal waterfall in Yosemite National Park, is illuminated by the sunset so that it glows orange-red.firehallAlternative form of fire hall (“fire station”).firesteelA firestriker.firetailAny Australian finch of the genus Stagonopleura.firetrail(Australia) Synonym of firebreak (“area cleared of flammable material to prevent fire from spreading”).firewall(physics) A hypothetical phenomenon where an observer falling into a black hole encounters high-energy quanta at or near the event horizon.firewheelGaillardia pulchella, a flowering plant of southern US, from Arizona to Florida, and northern Mexico.firewhirlAlternative form of fire whirl.firmamentalOf, belonging to, or relating to the firmament or heavens; celestial.firmisternal(biology, of frogs) Having the epicoracoid cartilages fused both anteriorly and posteriorly.fiscalRelated to the treasury of a country, company, region or city, particularly to government spending and revenue.fishballA food item made from pulverized fish shaped into a ball, popular in Chinese and Scandinavian cuisine and elsewhere around the world.fishbowlAlternative form of fish bowl.fishculturalSynonym of piscicultural.fishfulAbounding in fish.fishkillAn environmental event in which fish are killed.fishmealGround dried fish, used mainly for livestock feed.fishpoolA pool of water containing fish; fishpond.fishtailThe tail of a fish, or an object resembling this.fishwheelAlternative form of fish wheel.fissilingual(zoology) Having a forked tongue.fissionalOf or pertaining to fission.fissipedal(zoology) Being or relating to a fissiped.fissirostral(ornithology) Having the bill cleft beyond the horny part, as in the case of swallows and nightjars.fissuralPertaining to a fissure or fissures.fistballA European sport in which players attempt to hit a ball over a net with fists or arms.fistfulThe amount that can be held in a closed fist.fisticalSynonym of fistic.fitful(by extension) Characterized by sudden bursts of activity with periods of inactivity in between; intermittent, irregular, unsteady.fitocenologicalMisspelling of phytocoenological.fitosterolMisspelling of phytosterol.fixationalRelating to fixation.fl(typography) Initialism of flush left.flabel(obsolete) A fan or flabellum.flagballSynonym of flag football.flagfall(horse racing) The start of a horse raceflagtailAny of genus Kuhlia of perciform fish, having distinctive scaly sheaths around the dorsal and anal fins.flailA weapon which has the (usually spherical) striking part attached to the handle with a flexible joint such as a chain.flameful(poetic) Full of flame; fiery.flamemail(Internet) Aggressively insulting email.flamencologicalOf or relating to flamencology.flaminical(Ancient Rome) Pertaining to a flamen.flangetailAny of various species of gomphid dragonfly of the genera Ictinogomphus and Sinictinogomphus, of eastern Asia.flannel(uncountable) A soft cloth material originally woven from wool, today often combined with cotton or synthetic fibers.flannellObsolete form of flannel.flashballAlternative form of flash-ball.flaskfulAs much as a flask will hold.flatbillAny of various tropical primarily olive-green flycatchers, having a wide flat bill, members of the genera Ramphotrigon, Tolmomyias, and Rhynchocyclus.flavandiol(organic chemistry) Any diol derivative of flavanflavanol(organic chemistry) Any of a class of flavonoids that use the 2-phenyl-3,4-dihydro-2H-chromen-3-ol molecular skeletonflavanonol(organic chemistry) Any of a class of flavonoids that use the 3-hydroxy-2,3-dihydro-2-phenylchromen-4-one backbone.flavinyl(organic chemistry, especially in combination) A univalent radical derived from a flavin.flaviviralOf or pertaining to flavivirus.flavobacterialRelating to flavobacteriaflavodilol(pharmacology) An antihypertensive drug.flavogallol(organic chemistry) A bright yellow crystalline compound, C₂₁H₈O₁₂, that forms hair-like needles and can be used as a yellow dye.flavol(organic chemistry) A flavonoid obtained from anthraquinone.flavonal(organic chemistry) Relating to or composed of flavones.flavonoidalRelating to flavonoidsflavonol(organic chemistry) Any of several flavonoids that have a 3-hydroxyflavone backbone.flavoperidolMisspelling of flavopiridol.flavopiridol(medicine) alvocidibflavorfulFull of flavor.flavourfulBritish standard spelling of flavorful.flawfulFull of flaws; flawedfleckerlA dance step, involving revolving without moving forward, sometimes used in a Viennese waltzflecnodal(mathematics) Relating to a flecnodeflectionalPertaining to flection; serving to bend or vary, specifically, pertaining to the terminal variation of words; inflectional.fleetful(poetic, archaic) swift, rapidflerobuterol(pharmacology) A particular antidepressant drug.flestololA beta-adrenergic blocking drug.flexionalDated spelling of flectional.flexisexual(of a person) Having a fluid sexual orientation or pattern of sexual expression.flexoelectricalRelating to flexoelectricity.flextensional(anatomy) flexural and extensionalflexuralof, or relating to, flexureflickertailThe North American ground squirrel, Citellus richardsoni.flightful(archaic) Able to fly.flirtationalOf or relating to flirtation.flixelAn image, that combines a photo, and a video element that is looped to give the illusion of movement.floatelA floating hotel; a boatelflockfulThe amount that constitutes a flock (of birds, people etc.).flockmeal(now rare) In a flock; in flocks; in a herd.floodchannelA stream that becomes enlarged by carrying floodwaterfloodfulCharacterised by a flood or flooding.floodpoolAlternative form of flood pool.floodwallA man-made vertical barrier designed to temporarily contain the waters of a river or other waterway during a floodfloorballAn indoor ball game played with a stick like hockey.floorfulA quantity that fills or covers a floor.floppyful(computing, rare) The amount (of data) that a floppy disk can hold.floptical(computing, data storage) Using a combination of magnetic and optical technology.floralOf, pertaining to, or connected with flowers.floranol(organic chemistry) The vasorelaxant chromenone derivative (2R,3R)-3,5,7-trihydroxy-2-(2-hydroxyphenyl)-6-methoxy-8-(3-methylbut-2-enyl)-2,3-dihydrochromen-4-onefloreal(poetic) floral; floweryfloredil(pharmacology) A vasodilator.florfenicol(medicine) A synthetic fluorinated analog of thiamphenicolfloriculturalOf or pertaining to floriculture.flotationalPertaining to flotation.flotela ship converted to a permanently moored hotel.floterial(US, politics) An electoral district of this kind.flourmillAny gristmill.flowcellAlternative spelling of flow cell.flowcytometricalAlternative form of flowcytometric.flowerful(poetic) flowery, abundant in flowers.flowerpetalAlternative spelling of flower petal.flowerpotfulAs much as a flowerpot will hold.fluavil(organic chemistry, now rare) A hydrocarbon extracted from gutta-percha as a yellow resinous substance.fluctional(chemistry) Alternative form of fluxional.fluctuationalOf, pertaining to, or resulting from fluctuation(s)fludioxonilThe pyrrole fungicide 4-(2,2-difluoro-1,3-benzodioxol-4-yl)-1H-pyrrole-3-carbonitrilefluffballA ball of fluff.flufftailAny of nine species of bird in the genus Sarothrura, endemic to Africa.flugelAlternative form of flugelhorn.fluidal(chiefly geology) Pertaining to a fluid, or to a flowing motion.flukicidalKilling fluke worms.flumazenil(pharmacology) A benzodiazepine antagonist used to counter drowsiness caused by benzodiazepines.flumazepilAlternative form of flumazenil.fluminalRelating to a stream; fluvial.fluoral(organic chemistry) The compound trifluoroacetaldehyde, CF₃-CHOfluoralkylAlternative form of fluoroalkyl.fluorenol(organic chemistry) An alcohol derivative of fluorene.fluorenyl(organic chemistry, especially in combination) A radical or cation derived from fluorenefluorescyl(organic chemistry, especially in combination) A univalent radical derived from fluoresceinfluorestradiol(organic chemistry, medicine) Any of several fluoro derivatives of estradiol that have biological activity. Such compounds having isotopically-labelled fluorine atoms are used in medical imaging.fluoroalcohol(organic chemistry) Any aliphatic alcohol in which one or more hydrogen atoms have been replaced by fluorinefluoroalkyl(organic chemistry) An alkyl group in which one or more hydrogens have been substituted for fluorine.fluoroaryl(organic chemistry, especially in combination) Any fluoro derivative of an aryl radicalfluorobenzoyl(organic chemistry, especially in combination) Any fluoro derivative of a benzoyl radicalfluorobenzyl(organic chemistry) Any fluoro derivative of a benzyl radicalfluorochemicalAny chemical compound (especially an organic compound) containing fluorinefluoroestradiolA radioactive diagnostic agent, an analog of estrogen used to detect estrogen-receptor-positive breast cancer lesions.fluoroethoxymethyl(organic chemistry) Any fluoro derivative of an ethoxymethyl radicalfluoroethyl(organic chemistry, especially in combination) Any fluoro derivative of an ethyl radical.fluoroformolAn aqueous solution of fluoroform gas, formerly used to treat tuberculosis, whooping cough, etc.fluoroglucinolMisspelling of phloroglucinol.fluoromethyl(organic chemistry, especially in combination) The univalent radical CH₂F-fluorometricalAlternative form of fluorometric.fluorophenol(organic chemistry) Any fluoro derivative of a phenolfluorophenyl(organic chemistry, especially in combination) Any fluoro derivative of a phenyl radicalfluorosphericalRelating to fluorospheresfluorosulfonyl(chemistry, especially in combination) The univalent radical F-SO₂-fluorouracil(pharmacology) A fluorine-substituted derivative of uracil C₄H₃FN₂O₂ which inhibits DNA synthesis and is used as a chemotherapy drug in the treatment of cancer.fluorylSynonym of fluoroformol.flupenthixolAlternative form of flupentixol.flupentixol(pharmacology) A typical antipsychotic drug of the thioxanthenes.fluprostenol(pharmacology) A prostaglandin analogue.flurothylA volatile liquid drug from the halogenated ether family, acting as a stimulant and convulsant.flurouracilMisspelling of fluorouracil.flusoxololA beta-adrenergic blocking drug.flutefulThe amount that a flute (type of glass) will hold.flutemetamol(organic chemistry) The aromatic fluorine compound 2-[3-fluoro-4-(methylamino)phenyl]-1,3-benzothiazol-6-ol which is sometimes used as a radiopharmaceuticalflutolanilA particular fungicide.flutriafolA particular fungicide.flutterball(baseball) A type of pitch; knuckleball.fluvialOf, pertaining to, inhabiting, or produced by the action of a river or stream.fluvioglacial(geology) Describing a stream formed from glacial meltwaterfluviol(music) A small piccolo-like wooden flute used to accompany the sardana.fluviologicalRelating to fluviology.fluvioterrestrialRelating to land and fresh water, but not the seas.fluvisolA genetically young kind of soil found in alluvial deposits.fluxionalPertaining to, or having the nature of, fluxion or fluxions; variable; inconstant.flyballA type of dog-race where dogs jump over hurdles to get to and return from a tennis-ball dispensing box.flywheel(mechanical engineering) A rotating mass used to maintain the speed of a machine within certain limits while the machine receives or releases energy at a varying rate, or as a form of energy storage.fmlAbbreviation of formal.fmolAbbreviation of femtomole.foalA young horse or other equine, especially just after birth or less than a year old.focalBelonging to, concerning, or located at a focus (definite location).foetal(Commonwealth) Alternative spelling of fetal.foeticidal(UK) Alternative form of feticidal.foetofoetal(medicine) Alternative spelling of fetofetal.foetomaternalAlternative form of fetomaternal.foetoplacentalAlternative spelling of fetoplacental.fogbellAlternative form of fog bellfogfallThe act or time of a cloud of fog falling over an area.foidal(geology) feldspathoidalfoilA very thin sheet of metal.folderalAlternative spelling of folderol.folderfulAll of the documents, papers, notes, etc. that are contained in a folder.folderol(uncountable) Nonsense or foolishness.foldstoolA folding stool or collapsible seat.folisolA kind of organosol mainly containing thick deposits of forest litter overlying bedrock or unconsolidated material.folklorical(uncommon) Synonym of folkloric.foll(knitting) Abbreviation of following.folliful(obsolete) foolish.folyl(organic chemistry, especially in combination) The univalent radical derived from folic acidfontalOf, relating to, or from a spring or fountain.fontanelAlternative spelling of fontanelle.fontinalGrowing in or near springsfoodfallAlternative form of food fall.foodful(dated) Supplying food.foodstallA stall, typically in a market, at which food is sold.fool(derogatory) A person with poor judgment or little intelligence.foosball(chiefly US, Canada) table soccer (US), table football (UK)footballA sport played on foot in which teams attempt to get a ball into a goal or zone defended by the other team.footbrawl(informal) The sport of football when regarded as violent.footfall(countable) The sound made by a footstep; also, the footstep or step itself.footfulAn amount that can be picked up by one foot.foothillA hill at the base of a mountain or mountain range.footmeal(rare) Step by step: incrementally, little by little, by degrees, one foot (measure) at a time.footnail(uncommon) Synonym of toenail.footpedalAlternative form of foot pedal.footrailA rail serving as a support for the foot.footstall(historical) A type of stirrup, predominantly found on saddles designed for women.footstoolA low stool for supporting the feet while seated.footwall(geology) The section of rock that extends below a diagonal fault line (the corresponding upper section being the hanging wall).footwellThe space for the feet in front of a seat in a vehiclefootwheel(mechanics) Any wheel worked by means of the foot.foraminalRelating to the foramen.foraminiferalOf, pertaining to, or resembling the foraminifers; foraminiferousforaminiferologicalRelating to foraminiferology.forbiddal(archaic) The act of forbidding something.forcefall(rare, literal or figurative) A waterfall or cascading torrent.forcefulCapable of either physical or coercive force; powerful.forcefullObsolete form of forceful.forcepstail(zoology) A member of Diplura (two-pronged bristletails) in the families Evalljapygidae, Parajapygidae, and especially Japygidae.forcipalBranched and forked like a pair of forceps; constructed so as to open and shut.fordull(transitive, obsolete) To make dull; stupefy.forecallTo call in advance.foredealAn advantage; benefit; profit.forefeel(transitive) To feel or perceive beforehand or in advance; to have a presentiment of.forelTo bind with a forel.forelevelA level positioned at or near the front (of anything); a prior or previous level.forensal(archaic) Forensic.forensical(rare) forensicforesail(nautical, on a square-rigged ship) The lowest (and usually the largest) square sail hung on the foremastforesightfulHaving, exercising, or characterised by foresight; forward-looking; prudentforesignalA signal made or given in advance; a foresignforesmellA smell which precedes or comes before something.forespell(transitive) To spell in advance; foretell; make a warning about something upcoming; tell or indicate beforehand; predictforestal(uncommon) Relating to forestry (cultivating forests for harvest).forestall(transitive) To prevent, delay or hinder something by taking precautionary or anticipatory measures; to avert.forestaysail(nautical) A triangular sail attached to the forestay.forestfulEnough to fill a forest.forestialOf, like, or having to do with a forest.foretarsalRelating to the foretarsus.foretelObsolete spelling of foretell.foretell(ambitransitive) To predict; to tell (the future) before it occurs; to prophesy.forethoughtfulHaving or full of forethought; provident; proactive; visionary.foretibialRelating to the foretibiaforetopsail(nautical) The sail draped from the foretopmast.forewallThe foremost outer wall of a fortification; rampart, bulwark.forgetfulUnable to remember things well; liable to forget.forgetfullArchaic form of forgetful.forhill(transitive, obsolete) To cover; protect.forkball(baseball) A baseball pitch, much like the sinker.forkfulThe amount that a fork will hold.forktailAny of various small insectivorous birds in the genus Enicurus.forkytail(Geordie) An earwig (Dermaptera spp.).formalIn accordance with established forms.formationalOf or pertaining to formation (in any of many contexts).formel(rare) An adult female hawk or eagle.formeterolMisspelling of formoterol.formfulNot formless; having a form; substantive.formol(organic chemistry) A 10% solution of formaldehyde in water.formoterol(pharmacology) An agonist used in the management of asthma and chronic obstructive pulmonary disease, causing bronchodilation by relaxing the smooth muscle in the airway.formulationalOf or relating to formulation.formyl(organic chemistry) The univalent radical -CHO, derived from formaldehyde, that is characteristic of aldehydesformylmethionyl(organic chemistry, especially in combination) A formyl derivative of the methionyl radicalfornical(anatomy) Of or pertaining to the fornixfornicealOf or relating to a fornix.forrealAlternative form of for real.forrilllambskin parchment; vellum; forelforspill(transitive) To destroy; ruin; lose.forstallObsolete form of forestall.forsteal(transitive, obsolete) To steal away, rob, deprive.forsweal(transitive, obsolete) To burn up.forthdealAlternative form of foredeal.forthfill(transitive) To fulfill; also, to discharge (a legacy).forthtell(transitive) To tell forth; publish abroad.forthwithal(archaic) Forthwith; immediately.fortravel(transitive, obsolete) To exhaust with labour; forwork; forswink.forwall(intransitive, obsolete) To boil away.fosetylA particular fungicide.fosfestrol(pharmacology) Diethylstilbestrol diphosphate, a synthetic non-steroidal estrogen of the stilbestrol group, used in the treatment of prostate cancer.fosinopril(pharmacology) An angiotensin converting enzyme inhibitor used for the treatment of hypertension and some types of chronic heart failure.fosmidial(genetics) Relating to a fosmid.fossatorialRelating to a boundary (between neighbouring habitats)fossilThe mineralized remains of an animal or plant.fossilogicalRelating to fossilogy.fossilologicalRelating to fossilology.fossorial(zoology) Of, pertaining to, or adapted for digging or burrowing.fotmaelAlternative form of fotmal.fotmal(obsolete, units of measure) An old English unit of weight of 70 pounds, used particularly for leadfoulCovered with, or containing unclean matter; dirty.foundationalOf or relating to a foundation or foundations.fountful(poetic, archaic) Full of fountains or springs.fourball(golf) A match between two teams of two golfers, each playing his or her own ball throughout the round rather than alternating shots, and each hole won by the team whose individual golfer has the lowest score.fovealOf or pertaining to the fovea.fractal(mathematics) Having the form of a fractal; having to do with fractals.fractionalPertaining to a fraction.fractographicalOf or pertaining to fractography.fracturalOf or pertaining to a fracture.fragmental(geology) consisting of fragmentsfrailEasily broken physically; not firm or durable; liable to fail and perish.frakel(obsolete) Fraked.framboidalRelating to framboids.framecel(incel slang, derogatory, offensive) An incel with the skeletal structure of an adolescent boy.framefulA quantity that fills a frame (any sense).frampelAlternative form of frampold.franchisalPertaining to franchises.fraternalOf or pertaining to a brother or brothers.fratriarchalPertaining to or characteristic of a fratriarchy.fratricidalOf or pertaining to fratricide.fraudful(archaic) fraudulent.frazil(Canada, US) A collection of stray ice crystals that form in fast-moving water.freakful(archaic) Full of whims or caprices.freeball(intransitive, slang) To not wear underpants beneath one's outer clothing.freechapel(historical) A chapel founded by the king of England or built under a grant from the king, which is not subject to the jurisdiction of the local bishop or other ruling member of the clergy.freedstoolObsolete form of frithstool.freefall(physics) A state of motion affected by no acceleration or force other than that of gravity.freefellsimple past of freefallfreemail(Internet, chiefly attributive) An email service provided free of charge to the public.freeroll(poker) A poker tournament with no entry fee.freetailMexican free-tailed bat, Tadarida brasiliensisfreewheelA device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft.freewilAlternative form of free will.freewillVoluntary, done of one's own accord.freezerfulAs much as a freezer will hold.freezermillA cryogenic mill (used to grind frozen biological samples)frejolAlternative form of frijol.frekelAlternative form of frakel.frellA minced oath for fuck.frenalRelating to the frenum.freneticalAlternative form of frenetic.frenzical(obsolete) franticfrequential(physics) Of or pertaining to frequencyfresnel(physics) A unit of frequency equal to 10¹² hertz, or one terahertz.fretfulGiven to fretting.fretfullArchaic form of fretful.fricadelAlternative form of frikadelle.fricandelArchaic form of fricandeau.fricolateral(phonetics) lateral fricativefrictionalRelating to, or caused by, friction.fridgefulAs much as a fridge will hold.fridstolArchaic form of frithstool.fridstollArchaic form of frithstool.fridstoolArchaic form of frithstool.friendfulFull of friendlihood; friendly.friendgirl(colloquial) A female friend, as opposed to a girlfriend or lover.frightfulFull of something causing fright, whetherfrightfullArchaic form of frightful.frigorificalAlternative form of frigorific.frijolAny cultivated bean of the genus Phaseolus, especially the black seed of a variety of Phaseolus vulgaris.frikkadelA traditional Afrikaner dish of baked (or sometimes deep-fried) meatballs prepared with onion, bread, eggs, vinegar, and spices.frillA strip of pleated fabric or paper used as decoration or trim.frimsel(cooking) An egg noodle in Yiddish cuisine.friskful(rare) Lively; frolicsome.frithstool(historical) An Anglo-Saxon stone seat, placed near the altar of a church, which afforded protection to those seeking sanctuary.frivol(intransitive) To behave frivolously.frizel(firearms, historical) A movable furrowed piece of steel struck by the flint, to throw sparks into the pan, in an early form of flintlock.frl(Internet slang) Abbreviation of for real.frogstool(dialectal) Synonym of toadstool (“inedible or poisonous mushroom”).frolicful(archaic) frolicsomefrontalOf, relating to, directed toward, or situated at the front.frontaloccipital(anatomy) frontal and occipitalfronthaulThe movement of data from a remote to a central serverfrontobasalPertaining to the lower portion of the frontal lobes of the brain.frontocaudal(anatomy) frontal and caudalfrontocentral(anatomy, of a region of the brain) frontal and centralfrontoclypealfrontal and clypealfrontocortical(anatomy) Relating to the front of the cortexfrontoethmoidal(anatomy) Of or relating to a suture between the ethmoid bone and the frontal bone, located in the anterior cranial fossa.frontofrontalBetween two frontsfrontogenetical(meteorology) Synonym of frontogenetic.frontolacrimal(anatomy) frontal and lacrimal (especially in reference to those bones)frontolateral(anatomy) To the front and the sidefrontomarginal(anatomy) frontal and marginalfrontomedial(anatomy) In the front, near the midlinefrontomesial(anatomy) frontal and mesialfrontometaphyseal(anatomy) Relating to the front of a metaphysisfrontonasal(anatomy) relating to the frontal bone and the nosefrontooccipital(anatomy) frontal and occipitalfrontoorbital(anatomy) At the front of the skull and above the eye socketsfrontoparallelparallel, and viewed from the frontfrontoparietal(anatomy) Frontal and parietal (relating to such bones or lobes).frontoparietotemporal(anatomy) frontal and parietotemporalfrontopostorbital(anatomy) frontal and postorbitalfrontosagittal(anatomy) Frontal and sagittal.frontosquamosalAt the front of the squamosalfrontostriatal(anatomy) Of or pertaining to the striatal structures of the frontal lobe.frontosubcortical(anatomy) frontal and subcorticalfrontotemporal(anatomy) Of or pertaining to the frontal and temporal bones or lobesfrontotemporoparietal(anatomy) frontal and temporoparietalfrontoterminalfrontal and terminalfrontoventralfrontal and ventralfrownfulFrowning; scowlingfructal(rare) Of or relating to fruit.fructiculturalRelating to the growing of fruit.fructofuranosyl(biochemistry, in combination) A univalent radical derived from fructofuranosefructosyl(organic chemistry) The univalent radical derived from the hemiacetal form of fructosefrugal(of money and consumable goods): Careful or wise in expenditure; avoiding waste.fruital(rare) Of or relating to fruit.fruitbowlAlternative form of fruit bowl.fruitfulFavourable to the growth of fruit or useful vegetation; not barren.fruitfullArchaic form of fruitful.frustoconicalHaving the shape of a frustum of a cone.frustrationalOf or relating to frustration.frutefullObsolete spelling of fruitful.fruticulturalRelating to fruticulture.ftl(Internet slang) Initialism of for the loss.fuchsinophil(cytology) Cells or cellular material that stains readily with fuchsin.fucitol(biochemistry) The deoxy sugar alcohol (2R,3S,4R,5S)-hexane-1,2,3,4,5-pentanol, derived from a seaweed.fuckball(derogatory, slang, vulgar) Term of abusefuckdoll(slang, vulgar) A love doll.fuckskull(derogatory, rare, slang, vulgar) A term of abuse.fuckweasel(vulgar, slang, humorous) Term of abuse.fucoidal(botany) fucoidfucosal(organic chemistry) The aldehyde (2~{S},3~{S},4~{R},5~{S})-3,4,5,6-tetrahydroxy-2-methyloxane-2-carbaldehyde derived from fucosefucosterolA sterol with antidiabetic activity, isolated from algae.fucosyl(organic chemistry, especially in combination) The univalent radical derived from fucosefucoxanthinol(organic chemistry) An alcohol derived from fucoxanthinfucusol(obsolete, organic chemistry) An oily liquid, resembling and possibly identical with furfural, obtained from fucus and other seaweeds.fudgel(obsolete, intransitive) To pretend to work when in reality one is not doing anything.fuelSubstance consumed to provide energy through combustion, or through chemical or nuclear reaction.fugal(music, psychiatry) relating to a fuguefulcralOf or relating to a fulcrum.fulfilBritish standard spelling of fulfill.fulfill(transitive) To satisfy, carry out, bring to completion (an obligation, a requirement, etc.).fulgural(uncommon) Of or related to lightning, particularly (historical) in reference to its use in divination.fullContaining the maximum possible amount that can fit in the space available.fullerenol(organic chemistry) A polyhydroxylated derivative of a fullerenefullerolSynonym of fullerenol.fullfilMisspelling of fulfill.fullfillMisspelling of fulfill.fulvenyl(organic chemistry) Any univalent radical derived from a fulvene.fumaryl(organic chemistry, especially in combination) The divalent radical derived from fumaric acid -OCCH=CHCO-fumerellAlternative form of femerell.fummel(UK, dialectal, obsolete) A hinny (the hybrid of a male horse and a female donkey).functionalIn good working order.fundagelical(sometimes derogatory) Of, related to, or characteristic of both evangelical and fundamentalist Christianity.fundal(anatomy) Of or pertaining to a fundus.fundamental(physics) The lowest frequency of a periodic waveform.fundamentallObsolete form of fundamental.funebralAlternative form of funebrial.funebrial(obsolete) Pertaining to a funeral or funerals; funereal.funeralA ceremony to honor and remember a deceased person, often distinguished from a memorial service by the presence of the body of the deceased.funerallObsolete form of funeral.funerealOf or relating to a funeral.funerialSuiting a funeral; pertaining to burial.fungalOf or pertaining to a fungus or fungi.fungicidalOf, or relating to fungicide.fungiculturalRelating to fungiculture.fungisterolA kind of sterol found in fungi.fungologicalRelating to fungology.funnelA passage or avenue for a fluid or flowing substance; specifically, a smoke flue or pipe; the chimney of a steamship or the like.funspirational(informal) Both fun and inspirational.furalaxylA particular fungicide.furaneol(organic chemistry) A derivative of furanone, 4-hydroxy-2,5-dimethyl-3-furanone, used in the flavour and perfume industries to impart a strawberry scent.furanoflavonol(organic chemistry) A flavonol possessing a furan groupfuranosyl(biochemistry) Any univalent radical derived from a furanosefuranyl(organic chemistry, especially in combination) A univalent radical derived from a furan.furazabolA pharmaceutical steroid, a stanozolol derivative with a furazan ring system in place of the pyrazole.furballSynonym of hairball; a ball of fur, especially one coughed up by a cat.furcarbanilA particular fungicide.furcasternalRelating to the furcasternum of an insectfurcocercarialRelating to the furcocercaria larvafurfural(organic chemistry) A heterocyclic aldehyde derivative of furan, obtained commercially from bran, with several industrial uses.furfuryl(organic chemistry) The univalent radical derived from furfuralfurgonomical(furry fandom, very rare) Alternative form of furgonomic.furial(obsolete) Furious; raging; tormenting.furibundal(obsolete) Full of rage.furl(transitive) To lower, roll up and secure (something, such as a sail or flag)furolSynonym of furfural.furostanolAny of a group of saponins derived from a furostanefursonal(furry subculture) personal; relating to oneself or one's fursonafuryl(organic chemistry, especially in combination) The univalent radical derived from furanfusalPertaining to a spindle.fusarialOf or relating to the fusaria.fuselloviralRelating to the fuselloviruses.fuselolSynonym of fusel oil.fusil(heraldry) A bearing of a rhomboidal figure, originally representing a spindle in shape, longer than a heraldic lozenge.fusional(linguistics, of a language) Tending to overlay many morphemes in a manner that can be difficult to segment.fusobacterialRelating to the Fusobacteria.fusomal(biology) Relating to a fusomefusospirochetalRelating to fusospirochetes.futchelThe jaws between which the hind end of a carriage tongue is inserted.futsalA form of soccer played indoors, with five players per team.futuralOf or relating to the future.futuritial(rare) Synonym of futural: of or relating to the future.futurologicalPertaining to futurology.fuzilAlternative form of fusil (musket)fuzzballA ball of fuzzy material.fuzztailSynonym of broomtail (“small, inferior horse”).