Other Ending Letters

All 697 Matching Words

rabbitholeAlternative form of rabbit hole.rabbitlikeSimilar to a rabbit, or an aspect of a rabbit (for example, its shape, behaviors, or other traits).rabbittite(mineralogy) A monoclinic mineral containing calcium, carbon, hydrogen, magnesium, oxygen, and uranium.rabbitwiseIn the manner of a rabbit.rabblesomeCharacteristic or typical of (a) rabblerabejacite(mineralogy) An orthorhombic mineral containing calcium, hydrogen, oxygen, sulfur, and uranium.racecourseA course over which races are run.racefemineAn antispasmodic drug.racemelikeResembling or characteristic of a raceme.racemosideAny of a family of nonsteroidal saponins that induces programmed cell death in Leishmaniaracemulose(botany, dated) Growing in very small racemes.racinglikeResembling or characteristic of racing.racketlikeResembling or characteristic of a racket (implement with a handle used in sports).raclopride(pharmacology) A synthetic compound that acts as an antagonist on D₂ dopamine receptors.raconteuseA female storyteller.radafaxineA metabolite of bupropion being investigated for treatment of restless leg syndrome and as an NDRI antidepressant.radarscopeAn oscilloscope used as the viewing screen of a radar system.radicaliseNon-Oxford British English standard spelling of radicalize.radicalize(transitive) To make radical.radicative(obsolete, rare) causing to take root, establishingradiculoseProducing many rootlets or radicles.radiodromeA pursuit curve, in which the thing being pursued is moving at constant velocity.radiomovie(historical) A kind of primitive film transmitted by radio signals.radiopaqueImpenetrable to X-rays and other radiation.radiophileAny radiophilic organism.radioprobeA probe fitted with a radio transmitterradioscopeAn instrument for detecting or studying X-rays.radiosondeA miniature radio carried aloft (e.g. by an uncrewed balloon, an airdrop from a crewed aircraft, or a sounding rocket) to automatically transmit measurements of the upper air such as the wind speed, pressure, temperature, and relative humidity to a receiving station on the ground.radiowasteradioactive wasteradishlikeResembling or characteristic of a radish.radiumlikeResembling or characteristic of radium.radovanite(mineralogy) An orthorhombic-dipyramidal pistachio green mineral containing arsenic, copper, hydrogen, iron, and oxygen.rafoxanide(pharmacology) A salicylanilide used as an antiparasitic agent.railbridgeA bridge for railway transportraisinlikeResembling or characteristic of a raisin.ralitolineAn anticonvulsant drug.raloxifene(pharmacology) A drug with the chemical formula C₂₈H₂₇NO₄S, used orally as prophylaxis against osteoporosis after menopause.ralstonite(mineralogy) An isometric-hexoctahedral mineral containing aluminum, fluorine, hydrogen, magnesium, oxygen, and sodium.ramazzoite(mineralogy) A polyoxometallate mineral containing copper, oxygen, carbon, hydrogen, magnesium, phosphorus and sulphur.rambergite(mineralogy) A hexagonal-dihexagonal pyramidal mineral containing manganese and sulfur.ramblesomeCharacterised or marked by ramblingramdohrite(mineralogy) A monoclinic-prismatic bluish black gray mineral containing antimony, lead, silver, and sulfur.ramifiable(mathematics) Capable of being subdivided into branches.ramificate(biology) Branched.ramshackleIn disrepair or disorder; poorly maintained; lacking upkeep, usually of buildings or vehicles.ranachrome(organic chemistry) The fluorescent pigment 6-hydroxymethylpterin found in frog skinranchhouseA ranch-style house.randomlikeTypically or characteristically randomrandomwise(rare) randomlyranitidine(pharmacology) A furan (trademark Zantac) which blocks the histamine H₂-receptors, to prevent the secretion of gastric acid.rankachite(mineralogy) An orthorhombic-dipyramidal mineral containing calcium, hydrogen, iron, oxygen, tungsten, and vanadium.rankamaite(mineralogy) An orthorhombic-dipyramidal mineral containing aluminum, hydrogen, lead, lithium, niobium, oxygen, potassium, sodium, and tantalum.ranolazine(pharmacology) A drug C₂₄H₃₃N₃O₄ taken orally in the treatment of angina pectoris. It is marketed under the trademark Ranexa.ransomableSuitable for being held for a ransom.ransomware(computer security, derogatory) Software that is released as open source only in exchange for payment.rapamycineMisspelling of rapamycin.rapierlikeResembling or characteristic of a rapier; sharp, piercing.rappoldite(mineralogy) A triclinic-pinacoidal mineral containing arsenic, cobalt, hydrogen, lead, nickel, oxygen, and zinc.rapportageThe reporting of social news, especially by an eyewitness.rapportiveOf or relating to rapport, as established by speech acts.raptophileSynonym of biastophile.raptorlikeResembling or characteristic of a raptor (the bird of prey).rarefiableCapable of being rarefied.rasagiline(pharmacology) An inhibitor of monoamine oxidase used as a monotherapy in early Parkinson's disease or as an adjunct therapy in more advanced cases.rascallikeResembling or characteristic of a rascal.ratifiableCapable of being ratified.rationableSuitable for being rationed.ratiuncule(mathematics, obsolete) A ratio very close to unity.ratoonableAble to be ratoonedrattanwareArticles made from rattan.rattlepate(archaic) A chatterbox; someone who talks a lot.rattlesomeCharacterised or marked by rattlingrauhaugite(geology) A carbonatite composed mainly of dolomiteravageableCapable of being ravaged.ravenstone(UK, dialectal) A gravestoneravinelikeResembling or characteristic of a ravine.ravishableCapable of being ravished.rawinsondeA radiosonde whose position is tracked as it ascends to give wind speed and direction information.rayonnanceThe quality of being rayonnant.razorbladeAlternative spelling of razor blade.reactivateTo activate again.readmitteeOne who is readmitted.realestateAlternative form of real estate.realienate(transitive) To alienate again.realisableNon-Oxford British English standard spelling of realizable.realizableCapable of being realized (made real) or achieved.realkaliseAlternative spelling of realkalize.realkalizeTo alkalize again.realkylate(organic chemistry) To alkylate again, typically following a dealkylationreallianceA renewed alliance.reallocate(transitive) To allocate (a resource) to another person or purpose.realschuleSynonym of real school.reambulateTo undergo reambulationreannotateTo annotate again or differently.reannounce(transitive) To announce againreapparate(fantasy) To reappear magically.reappraiseTo appraise again.reasonable(now rare) Having the faculty of reason; rational, reasoning.reaspirateTo aspirate againreassembleTo assemble again.reassigneeOne who is reassigned.rebamipideAn amino acid derivative of 2(1H)-quinolinone, used for mucosal protection, healing of gastroduodenal ulcers, and treatment of gastritis.rebaseline(transitive, business) To provide (a project) with a new baseline.rebillableAble to be rebilled.rebindableAble to be rebound.reblockageA second or subsequent blockage.rebookableAble to be rebooked.rebootableCapable of being rebooted.reboxetine(pharmacology) An antidepressant drug used in the treatment of clinical depression, panic disorder and ADD/ADHD.rebuffableCapable of being buffed many times.rebukeableAlternative form of rebukable.rebuttableCapable of being rebutted.recallableCapable of being recalled (retrieved from one's memory).recanaliseto canalise againrecanalizeAlternative spelling of recanalise.recanonize(transitive) To canonize again.recantableThat can be recanted.recapitate(transitive) To furnish with a head again; to reattach a head to.recappableCapable of being recapped (of a tire: having the worn tread replaced).recarriage(archaic) The act of carrying or transporting back.recastableAble to be recast.recavitateTo cavitate againreceivableCapable of being received, especially of a debt, from the perspective of the creditor.recesslikeResembling or characteristic of a recess.recidivate(intransitive) To relapse into a previous pattern of behavior, especially to commit new offenses after having been punished or sanctioned for earlier ones.recidivize(intransitive) Synonym of recidivaterecipelikeLike a recipe; consisting of formulaic steps.recipienceThe ability to receive; receptivityreciproque(obsolete) reciprocalrecivilize(transitive) To civilize again.reckonableAble to be reckoned or computed.recleavageA second or subsequent act of cleavingreclinableAble to be tilted so as to recline.reclosableCapable of being closed again after opening.recoalesce(intransitive) To coalesce again or anew.recoatableAble to be recoated.recodonise(genetics) To rearrange the codons of a generecogniseeAlternative spelling of recognizee.recognizee(law) The person in whose favour a recognizance is made.recognosce(rare, obsolete) To recognise.recollapseTo collapse again.recoloniseNon-Oxford British English standard spelling of recolonize.recolonizeTo colonize again, especially after decolonization.recommenceTo begin again.recompenceObsolete form of recompense.recompenseAn equivalent returned for anything given, done, or suffered; compensation; reward; amends; requital.recomplete(transitive) To complete again.reconceiveTo conceive something in a new wayreconcileeOne who is reconciled.reconcludeTo conclude again.reconcrete(transitive) To concrete again.recondenseTo condense again.reconflate(transitive) To conflate again.reconserveTo conserve again.reconstrueTo construe something again, or in a new way.recontinueTo continue again, especially after a pause.recontriveTo contrive again.reconverge(intransitive) To converge again.reconvinceTo convince again.reconvolveTo convolve again.recopiableAble to be recopied.recopulateto copulate again.recordableThat can be recorded; capturable.recordance(obsolete) remembrancerecordlikeResembling or characteristic of a record (historical document, etc.).recordwiseIn terms of a record (in several contexts)recoronateTo coronate again.recoupableAble to be recouped.recreativeBeing, or pertaining to, recreation.recreolize(linguistics) To modify a language by introducing additional elements of the matrilect.recritique(transitive) To critique again.recrudesce(intransitive) To recur, or break out anew after a quiescence or dormant period.recruitageThe act of recruiting, as for the military; recruitment.rectigradeWalking straight forward.rectocoeleAlternative form of rectocele.rectoscopeA proctoscope.recumbenceThe act of leaning, resting, or reclining; the state of being recumbent.recuperate(transitive) To restore (someone or something) to health, strength, or currency; to revive or rehabilitate.recurrenceReturn or reversion to a certain state.recusative(linguistics) Including the word 'not' (or its equivalent).recyclableAble to be recycled.redactableCapable of being redacted or censored.reddingite(mineralogy) An orthorhombic-dipyramidal mineral containing hydrogen, manganese, oxygen, and phosphorus.redecimate(transitive) To decimate again.redecorate(transitive) To change the appearance of a place by altering the decor.redecreaseTo decrease again.rededicate(transitive) To dedicate again.redeemableCapable of being redeemed; able to be restored or recovered.redelegate(transitive) To delegate again or anew.redemptiveCausing, or relating to, redemption or saving; redeeming.redempture(obsolete) redemptionredenounce(transitive) To denounce again.redeployeeOne who is redeployed.redeputize(transitive) To deputize again.redescribe(transitive) To describe again.redgillite(mineralogy) A monoclinic-prismatic grass green mineral containing copper, hydrogen, oxygen, and sulfur.rediagnoseTo diagnose again.redigitizeTo digitize againredimeriseAlternative form of redimerize.redimerize(chemistry) To dimerize again, typically as a result of dismutationredisburseTo give or pay out again.rediscloseTo disclose again.redisguise(transitive) To disguise again.redispense(transitive) To dispense again.redisperseTo disperse again or anew.redisplace(transitive) To displace again.redisseiseAlternative form of redisseize.redisseize(law, transitive, archaic) To disseize back, or a second time.redissolveto dissolve againredneckese(informal) The style of language stereotypically used by rednecks.redomicile(transitive) To domicile again or anew.redominateTo dominate again.redoxclineA layer of water, having a strong vertical redox gradient, between the upper oxygenated and lower anoxic waterredrainageThe act of draining again.redressiveTending to redress.redruthite(mineralogy) Synonym of chalcocite.reducataseMisspelling of reductase.reduceableAlternative form of reducible.redundance(now rare) Redundancy.redynamizeTo dynamize anew.reeligibleEligible again; capable of reelection.reenergiseAlternative form of reenergize.reenergize(transitive) To energize again or anew.reenkindle(transitive, archaic) To rekindle again.reenthrone(transitive) To enthrone again; to restore to the throne.reentranceA second or subsequent entrance; the act of reenteringreenvisageto envisage again, after some timereescalate(transitive) To escalate again.reestimate(transitive) To estimate again.reevaluateAlternative spelling of re-evaluate.reexchangeA renewed exchange.reexposureA second or subsequent exposure.refederateTo federate again.refeminiseAlternative form of refeminize.refeminize(transitive) To make feminine again.referrableAble to be referred.refigurateTo figurate again; to reshape.refillableCapable of being filled again.refindableCapable of being found again.refineableAlternative form of refinable.refittableAble to be refitted.reflectiveThat reflects, or redirects back to the source.reflexibleArchaic spelling of reflectablereflexmate(chess) A chess puzzle in which white, moving first, must force black to deliver checkmate within a specified number of moves.reflowableCapable of being formed into a different shape by flowing.refoldableCapable of being refoldedreformableThat can be reformed.refractileAble to refract, refractiverefractiveThat refracts; causing or relating to refraction.refractureTo fracture again.refragable(obsolete) Capable of being refuted; refutable.refuelableAlternative form of refuellable.refugitiveA fugitive who seeks refuge in another state or country.refulgencethe quality of being refulgent; refulgencyrefumigate(transitive) To fumigate again.refundableAble to be refunded in case of customer dissatisfaction, loss, breakage etc.refutativeServing to refute; refutatory.regainableCapable of being regained.regardableWorthy of regard; noteworthy.regenerate(transitive) To construct or create anew, especially in an improved manner.regenerome(biochemistry, physiology) the totality of the regeneration functions of an organ (especially of the liver)regenotype(transitive) To genotype again.reginicideAlternative form of reginacide.regionwideThroughout a region.registereeOne who appears on a register.registrate(Scotland, obsolete) registered, recordedreglaciate(ambitransitive) To glaciate again.regressiveThat tends to return, revert or regress.regulariseNon-Oxford British English standard spelling of regularize.regularizeTo make regular.regulativeOf or relating to regulation; having a regulatory function.regulatome(biochemistry) All the regulatory metabolic pathways of an organismrehashableAble to be rehashed.reheatableSuitable for reheating.rehumaniseAlternative form of rehumanize.rehumanize(transitive) To make human again.rehymenateSynonym of revirginate.reillumine(transitive) To illumine again or anew.reimburseeOne who is reimbursed.reimmunize(transitive) To immunize again.reincrease(transitive) To increase again.reincubateTo incubate again.reinfusateThe material used in a reinfusionreinitiateTo initiate again.reinscribeTo inscribe again.reinsulate(transitive) To insulate again or anew.reinthroneArchaic form of reenthrone.reintubateTo intubate again.reirrigate(transitive) To irrigate again.reissuableCapable of being reissued.reissuanceA second or subsequent issuance.reiterableCapable of being reiterated.rejectableThat can be rejected.rejectibleAlternative form of rejectable.rejoinableCapable of being rejoined.rejoindure(obsolete) The act of joining again.rejuvenateTo render young again.rejuvenile(informal) An adult whose interests and activities are characteristic of those of children.rejuveniseAlternative form of rejuvenize.rejuvenize(transitive, archaic) To rejuvenate.rejuvinateMisspelling of rejuvenate.relateableAlternative spelling of relatable.relatiniseAlternative form of re-Latinize.relatinizeAlternative form of re-Latinize.relativiseNon-Oxford British English standard spelling of relativize.relativizeTo make one thing relative to another.relaxasomeMisspelling of relaxosome.relaxativeHaving the quality of relaxing; relaxing or laxative.relaxosome(biochemistry) The complex of proteins, including relaxase, that facilitate plasmids during bacterial conjugationreleasableCapable of, or suitable for, release.releasibleAlternative form of releasable.relegaliseAlternative form of relegalize.relegalize(transitive) To make legal again.reliberate(transitive) To liberate again.relieflikeResembling or characteristic of relief (the difference of elevations on a surface).relievableCapable of being relievedreligicideThe destruction of a religion.religieuseA type of eclair made of two choux pastry cases, the smaller fixed atop of the other.relinkableCapable of being relinked.relipidateTo lipidate again, typically following delipidationreliquairereliquary (container)relishableCapable of being relished; pleasant to the taste; gratifying.relishsome(archaic) Tasty; delicious.relitigate(transitive, intransitive) To litigate again; to sue or pursue legal remedy a second or further time.reloadableThat can be reloaded.relocaliseAlternative form of relocalize.relocalizeTo localize (in any sense) again, especially after delocalization has occurredreloxifeneMisspelling of raloxifene.reluctanceUnwillingness to do something.remacemideA drug that acts as a low-affinity NMDA antagonist with sodium channel blocking properties.remakeableAlternative form of remakable.remandableAble to be remanded.remappableCapable of being remapped.remarkableunusual or impressive enough to deserve attentionremarriagea second or subsequent marriage.remediableCapable of being remedied.remeditateTo meditate again.rememorateTo remember or recallrememorize(transitive) To memorize again.remendableAble to be mended againremetalateTo metalate again, typically following demetalationremissibleCapable of being remitted or forgiven.remitigateTo mitigate again.remittableCapable of being remittedremittanceThe act of sending money to someone.remittence(medicine) A temporary abatement, without actual cessation, of symptoms.remobilise(British spelling) Alternative spelling of remobilize.remobilize(transitive) To mobilize again.remoderateTo moderate again.remodulate(transitive) To modulate again or anew.remoldableRepeatedly moldable.remonetiseNon-Oxford British English standard spelling of remonetize.remonetizeTo monetize again.remoraliseAlternative form of remoralize.remoralize(transitive) To supply with morals again.remorphizeTo return to the original form after it had been transformed.remortgageTo mortgage again.remotivateTo motivate again.removeableAlternative form of removable.remunerate(transitive) To compensate; to pay.renameableAlternative form of renamable.renanolone(pharmacology) A semisynthetic neuroactive steroid.renascence(now rare) A new beginning or rebirth; regeneration.renascible(archaic) Able to be reproduced.renaturase(biochemistry) An enzyme that catalyses renaturationrenaturateTo cause or to undergo renaturation.renavigateTo navigate again.renderableCapable of being rendered.reniculate(anatomy) Having reniculirenodulateTo nodulate again or subsequentlyrenominate(transitive) To nominate again.renovativeRelating to renovation.rentcharge(property law) An annual sum or periodic payment charged on certain freehold properties or payable out of the income of those properties and expressly giving to the rentcharger, who has no reversionary interest in the property, the right of distress for arrears.renucleateTo reinsert a nucleus into a cell.renumerate(transitive) To renumber (number again).renunciateOne who has renounced.renzapride(pharmacology) A gastroprokinetic agent and antiemetic.reopenableCapable of being opened again.reoperable(surgery) Able to be reoperated uponreoptimiseAlternative form of reoptimize.reoptimizeTo optimize againreorganise(British spelling) Alternative spelling of reorganize.reorganize(transitive) to organize something again, or in a different mannerreovertakeTo overtake again.repackableAble to be repacked.repaganize(transitive) To paganize again; to return to paganism.repaginateTo paginate again or in a different way.repairableAble to be repaired.reparativeTending to or intended to repair.repatriateA person who has returned to their country of origin or whose original citizenship has been restored.repealableCapable of being repealed.repeatableAble to be repeated.repechargeMisspelling of repechage.repellableAble to be repelled.repellenceAlternative form of repellency.repentableOf which one may repent.repentanceThe condition of being repentant, penitent.reperceiveTo perceive again, usually in a different way.repersuade(transitive) To persuade again.repertible(rare, obsolete) Synonym of findable: able to be found.repertoireA list of dramas, operas, pieces, parts, etc., which a company or a person has rehearsed and is prepared to perform or display.repetetiveMisspelling of repetitive.repetitiveHappening many times in a similar way; containing repetition; repeating.replacableMisspelling of replaceable.replayableThat can be replayed.replicablePossible to replicate or reproduce; reproducible.replichore(genetics) A replicated half of a chromosome in some bacteriarepolariseNon-Oxford British English standard spelling of repolarize.repolarizeTo polarize again.repopulateTo populate again; to breed among a group in order to keep the population up.reportable(of a disease etc) That must be reported to the proper authorities; notifiablerepostpone(transitive) To postpone again.repoussageThe art or process of hammering out or pressing thin metal from the reverse side, either to produce decorative work or to level up part of an etched plate that has been worked so as to cause a depression.repressiveServing to repress or suppress; oppressiverepressureTo pressurize again; to restore to a given pressurereprevableObsolete form of reprovable.reprisableLiable to be compensated for something that was taken.reprobance(obsolete) reprobationreprovablereproachable; worthy of reproof or censurerepubliqueObsolete spelling of republic.repudiableAble or fit to be repudiated.repugnableCapable of being repugned or resisted.repugnanceExtreme aversion, repulsion.repulpableSuitable for repulping.repuncture(transitive) To puncture again.repurchaseTo buy back or again; to regain by purchase.reputativereputed; putativerequestive(linguistics) Of, pertaining to, or for the purpose of making requests.requirableCapable of being required.requitableThat may be requited.reregulate(transitive) To regulate again or anew.rerollableOf scrap metal: capable of being rolled out again.reroutableCapable of being rerouted.rerunnableCapable of being rerun.resaleableAlternative form of resalable.resanitizeTo repeat sanitization.resaturateTo saturate again.rescalableThat can be rescaledreschedule(transitive) To schedule again or at a different time.rescramble(transitive) To scramble again.rescribbleTo scribble again.resealableAble to be resealed.researcheeOne who is researched.reseatableAble to be reseated.resectable(surgery) Suitable for resectionreseedableAble to be planted again with seeds.resellableCapable of being resold.reseminate(obsolete) seminate againresendable(rare) Capable of being sent again.resentableDeserving resentment.resentence(law, transitive) To issue a new sentence for certain crimesreseparateTo separate again.resequence(transitive) To sequence again.reservableThat may be reserved.reservance(archaic, rare) Reservation.resettableCapable of being reset.reshapableCapable of being reshaped.resignableAble to be resigned.resilience(psychology, neuroscience) The mental ability to recover quickly from depression, illness or misfortune.resimulateTo simulate again.resinosideThe glycoside of a resinresistableAlternative form of resistible.resistanceThe act of resisting, or the capacity to resist.resistence(rare) Alternative form of resistance.resistibleAble to be resisted.resizeable(computing, UK) Alternative form of resizable.resolutiveServing to dissolve or relax.resolvableAble to be resolved; to which a solution may be found.resolvance(optics) The resolving power of a lens or deviceresolvibleArchaic form of resolvable.resonicateTo sonicate againresorbableAble to be resorbed.resorptiveOf, pertaining to, or caused by resorption.resortlikeResembling or characteristic of a resort (compound of holiday buildings).respectiveRelating to particular persons or things, each to each; particular; own.respirableOf air: breathable.responsiveAnswering, replying or respondingresponsure(obsolete) A response.restagnate(obsolete) To stagnate; to cease to flow.restaurate(obsolete or nonstandard) To restore.restorableCapable of being restored or reclaimedrestoritie(obsolete) A restorative.restricteeA person who is subject to a restriction.resubmergeTo submerge again.resultance(archaic) The act of resulting; that which results; a result.resumptiveThat is in the nature of resumption.resupinate(botany) Having the appearance of being upside down.resurgenceAn instance of something resurging; a renewal of vigor or vitality.retabulateTo tabulate again, often differently.retailableAble to be retailed.retainableCapable of being retained.retardableCapable of being retarded, or delayed.retardance(physics) The difference in phase shift between two characteristic polarizations of light upon reflection from an interface. Retardance can be reported in the Abelès or Mueller conventions. The retardance phase shift angle is often specified in degrees.retardlike(derogatory, slang) Resembling a retard.retelevise(transitive) To televise again.retestableCapable of being retested.retgersite(mineralogy) A tetragonal-trapezohedral dark green mineral containing hydrogen, nickel, oxygen, and sulfur.retheorizeTo theorize again or anew.reticulateNetwork-like in form or appearance.reticuline(organic chemistry) An alkaloid found in opium.reticuloseForming a network; characterized by a reticulated structure.retigabine(pharmacology) An anticonvulsant drug.retinalite(mineralogy) A translucent variety of serpentine of a honey-yellow to greenish-yellow colour, with a waxy resinous lustre.retinamide(organic chemistry) Any amide of retinoic acid.retinocyte(ophthalmology) a specialized cell in the retina of the eye, specifically referring to photoreceptor cells (rods and cones) that detect light and initiate vision.retinosomeA lipid organelle present in retinal epitheliumretinulate(archaic, rare, zoology) Having, or characterized by, retinulae.retipilate(botany, of a pollen grain) Having a reticulate pattern of pilaretokenize(transitive, computing) To tokenize again.retortableTo which one may produce a counterargument; answerable.retractate(obsolete) To retract; to recant.retractileThat can be retracted (as a cat's claws)retractiveThat which retracts or withdraws.retraverse(transitive) To traverse again.retroamide(organic chemistry) An isomer of an existing amide in which the main substituent is attached to the NH group instead of the CO group of the -CO-NH- groupretrocline(intransitive, dentistry) Of teeth, to lean backward.retrodiene(organic chemistry) used attributively to describe the removal of a previously added diene moiety from a moleculeretrogradeDirected or moving backwards in relation to the normal or previous direction of travel; retreating.retrophileOne who loves the past, or past styles.retroquireAlternative form of retrochoir.retrorsine(organic chemistry) A cytotoxic pyrrolizidine alkaloid, 12,18-dihydroxysenecionan-11,16-dione, isolated from various plantsretroscapeA landscape or setting filled with things from the past.retroverseArranged in a backwards or reverse manner.retrusible(rare) Capable of being retruded.returnableCapable of being returned.reunitableCapable of being reunited.reurbanize(transitive) To urbanize again or anew.revaccineeA person or animal who has been revaccinatedrevalidateTo validate again.revaloriseAlternative spelling of revalorize.revalorizeTo reevaluate the value of something.revaluableCapable of being revalued.revaporizeTo vaporize again.revealableAble to be revealed; capable of revealing.revegetate(transitive, chiefly ecology) To produce new vegetation on (a barren ground or area); to colonize (barren ground).revelativeSynonym of revelatory.reverbrateAlternative form of reverberate.reversableAlternative form of reversible.reversibleAble to be reversed.revertableAlternative form of revertible (which is the more common form)revertibleAble to be reverted.reviewableEligible for review or reconsideration.revigorate(obsolete) To give new vigour to.revitaliseTo give new life, energy, activity or success to something.revitalizeAmerican and Oxford British English standard spelling of revitalise.revivicate(transitive, obsolete) To revive or revitalize; to bring back to life.revocativeRevocatory; tending to revoke or recall.revolutive(botany) Having the edges roll back spirally on each side during aestivation, as in rosemary.revolvableCapable of being revolved, rotatable.rewardableWorthy of reward.rewashableThat can be rewashed.rewindableThat can be rewound.rewireableHaving adjustable wiring.rewordable(rare) Able to be expressed in different words.reworkableCapable of being reworked.rewritableAble to be rewritten, or written again.rezbanyite(mineralogy) A mineral consisting of lead, copper, and bismuth sulfide.rhabdomereAny of the small, rodlike parts of a rhabdom.rhabdosomeA graptolite colony.rhachitome(zoology) Any amphibian of the clade Rhachitomi.rhaetizite(obsolete, mineralogy) A variety of the mineral kyanite.rhamnoside(organic chemistry) Any glycoside of rhamnoserhamnulose(biochemistry) a particular deoxyketohexose related to sorboserhapsodiseNon-Oxford British English standard spelling of rhapsodize.rhapsodize(intransitive) To speak with exaggerated or rapturous enthusiasm (about, (up)on or over something).rheumatizeAlternative form of rheumatiz.rhinestoneAn artificial diamond, strass.rhinophoreA club-shaped structure that occurs in pairs as the most prominent part of the external head anatomy of the dorid nudibranchs.rhinoscopean instrument used to examine inside the noserhizobiome(biology) The biome associated with a rhizosphererhizophore(botany) The structure bearing the true roots in certain species of Selaginella.rhizophyte(botany) Any vascular plant that has rootsrhizoplaneThe microenvironment of a root system near the surface.rhizostome(obsolete) Any member of the Rhizostomata, certain discomedusan jellyfish.rhizotroneAlternative form of rhizotron.rhodophane(biochemistry) The red pigment in the inner segments of the cones of the retina in animals.rhodophyte(biology) Any red alga (of phylum Rhodophyta).rhombogene(zoology) A dicyemid that produces infusoria-like embryos.rhombomere(developmental biology, neurology) A temporarily divided segment of the developing neural tube, within the hindbrain regionrhyacolite(mineralogy) A glassy feldspar found at Mount Somma in Italy.rhymeproseAn early form of poetry, not strictly distinguished from prose writing, but having certain poetical features.rhyodacite(geology) An extrusive volcanic rock intermediate in composition between dacite and rhyoliteribalinine(organic chemistry) The quinoline alkaloid 3-hydroxy-2,2,10-trimethyl-2,3,4,10-tetrahydro-5H-pyrano[2,3-b]quinolin-5-oneribandlikeResembling or characteristic of a riband.ribbonlikehaving the characteristics of ribbonsribokinase(biochemistry) A transferase enzyme that catalyzes the chemical reaction ATP + D-ribose ⇌ ADP + D-ribose 5-phosphate.ribosylase(biochemistry) An enzyme that catalyses ribosylation.ribosylate(transitive) To modify by means of ribosylation.richellite(mineralogy) A tetragonal-pyramidal mineral containing calcium, hydrogen, iron, oxygen, and phosphorus.richterite(mineralogy) A basic silicate mineral of sodium, potassium, magnesium, manganese, and calcium belonging to the amphibole groupricinolateAny salt or ester of ricinolic acid.ricinosome(biology) A plant organelle associated with programmed cell deathrickardite(mineralogy) An orthorhombic mineral containing copper and tellurium.rickrollee(Internet slang, rare) Someone who gets rickrolled; the target of a rickroll.riddlelikeResembling or characteristic of a riddle.riddlesomeCharacterised by riddles or riddling; enigmaticridgepieceSynonym of ridgepole.ridgeplateSynonym of ridgepiece.ridiculiseAlternative form of ridiculize.ridiculize(obsolete or nonstandard) To make ridiculous; to ridicule.riebeckite(mineralogy) A form of amphibole rich in sodium, the fibrous form of which, crocidolite, is a type of asbestos.rifametane(pharmacology) The antibiotic 3-azinomethyl-rifamycin.riflescopeA telescopic sight for a rifle.rigamarole(chiefly US) Alternative form of rigmarole.rigescenceThe quality of being rigescent.rimexolone(pharmacology) A glucocorticoid steroid used to treat inflammation of the eye.ripidolite(mineralogy) A translucent green chlorite mineral of micaceous structure; a hydrous silicate of alumina, magnesia, and iron.ristoranteAn Italian restaurant.ritornelleAlternative form of ritornello.rivadavite(mineralogy) A monoclinic-prismatic mineral containing boron, hydrogen, magnesium, oxygen, and sodium.riverdanceA theatrical show based on traditional Irish music and dance.riverscapeA landscape that features a river.rizosphereMisspelling of rhizosphere.roachicide(US) A substance that kills cockroaches.roadbridgeAlternative spelling of road bridge.robenidineA particular coccidiostat.robertsite(mineralogy) A monoclinic-prismatic mineral containing calcium, hydrogen, manganese, oxygen, and phosphorus.roborativeGiving strength; invigorating.robotesqueCharacteristic of robots.roboticideThe killing of a robot.roboticiseAlternative spelling of roboticize.roboticizeTo convert into a robotic alternative.roccellineAlternative form of roccellin.rockallite(mineralogy) A relatively dark, iron-rich peralkaline granite forming part of the islet of Rockall.rocketlikeResembling a rocket, especially in shape, speed or energyrocovitineMisspelling of roscovitine.rodentlikeResembling or characteristic of a rodent.roedderite(mineralogy) A hexagonal-dihexagonal dipyramidal mineral containing iron, magnesium, oxygen, potassium, silicon, and sodium.roggianite(mineralogy) A tetragonal-ditetragonal dipyramidal mineral containing aluminum, beryllium, calcium, hydrogen, oxygen, and silicon.rohitukineA chromane alkaloid C₁₆H₁₉O₅N, found in Dysoxylum species.rollandite(mineralogy) A orthorhombic mineral containing astatine, hydrogen, oxygen, and copper.romanesqueAlternative letter-case form of Romanesque.romarchite(mineralogy) A tetragonal-ditetragonal dipyramidal black mineral containing oxygen and tin.rombowline(nautical) Old, condemned canvas, rope, etc., unfit for use except in chafing gear.romifidineA veterinary sedative N-(2-bromo-6-fluorophenyl)-4,5-dihydro-1H-imidazol-2-aminerondorfite(mineralogy) An isometric-diploidal mineral containing aluminum, calcium, chlorine, hydrogen, iron, magnesium, oxygen, silicon, sodium, and titanium.ronidazole(pharmacology) An antiprotozoal agent used in veterinary medicine for the treatment of histomoniasis and swine dysentery.ronnalitreOne octillion (10²⁷) litres.ronnametre(metrology) An SI unit of length equal to 10²⁷ metres. Symbol: Rmrontgenite(mineralogy) A mixed carbonate and fluoride of calcium and a lanthanide, typically cerium or lanthanumrookielikeCharacteristic of a rookie; amateurish, naive.ropebridgeAlternative spelling of rope bridge.ropinirole(pharmacology) A particular dopamine agonist used in the treatment of Parkinson's disease.roquelaireObsolete spelling of roquelaure.roquelaure(now archaic, historical) A lined and trimmed cloak that reaches to the knees, often with bright-coloured lining and trimmed with fur.rosanilineAn organic base, C₂₀H₁₉N₃, used to make the dye fuchsineroscherite(mineralogy) A triclinic-pinacoidal mineral containing beryllium, calcium, hydrogen, iron, manganese, oxygen, and phosphorus.roscoelite(mineralogy) A monoclinic-prismatic mineral containing aluminum, hydrogen, magnesium, oxygen, potassium, silicon, and vanadium.roseophageAny virus that is parasitic to bacteria of the genus Roseobacterrosickyite(mineralogy) A monoclinic-prismatic mineral containing sulfur.rossmanite(mineralogy) A trigonal-ditrigonal pyramidal mineral containing aluminum, boron, hydrogen, lithium, oxygen, and silicon.rostellate(botany) Having a rostellum, or small beak; terminating in a beak.rosterable(chiefly sports) Capable of being rostered, or included in a lineup.rotamerize(chemistry) To convert into a rotamerrotateableAlternative spelling of rotatable.rotenolone(organic chemistry) The 12a-hydroxy derivative of rotenonerotigotineThe dopamine agonist (S)-6-[propyl(2-thiophen-2-ylethyl)amino]-5,6,7,8- tetrahydronaphthalen-1-ol, used to treat Parkinson's disease and restless legs syndrome.rotisserieA cooking device with which food is roasted on a rotating spit.rotoxamineThe maleic acid salt of the levorotatory isomer of carbinoxamine.roughhouse(idiomatic) Of behavior, rowdy, boisterous, or fighting.roundhouseA circular prison, especially a small local lockup or station house.roundstoneSmall stones used for paving.roundtableAlternative form of round table.rowlandite(mineralogy) A rare yttrium silicate mineral.roxatidine(pharmacology) A particular H₂ receptor antagonist.rubberlikeHaving the characteristics of rubber.ruberosideA particular steroid glycoside.rubidgeineAny extinct therapsid of the subfamily †Rubidgeinaerubiginose(botany, archaic) Having the appearance or colour of iron rust; rusty-looking.ruboxetineMisspelling of reboxetine.rudderhole(nautical) The hole in the deck through which the rudderpost passes.rudderlikeResembling or characteristic of a rudder.rudenkoite(mineralogy) A monoclinic white mineral containing aluminum, barium, calcium, chlorine, hydrogen, oxygen, silicon, and strontium.ruderalise(soil science, intransitive, very rare) To become ruderal.rufescenceThe quality of being rufescent; reddishness.ruffianage(archaic) collectively, ruffians; a group of ruffians.ruffianize(archaic, intransitive) To act like a ruffian.ruffleable(rare) Able to be ruffled.rufinamide(pharmacology) A triazole derivative used as an anticonvulsantrumblesomeCharacterised or marked by rumblingrumbowlineAlternative form of rombowline.ruminativeCausing rumination or prone to it; thoughtful.ruminotypeAny of several distinct types of bacteria that inhabit the rumen of an animalrumortrage(finance, colloquial) An increase in trading activity prompted by rumors of a takeover.rumplesome(chiefly dialectal) Characterised or marked by rumpling; tousled; disturbedrumswizzleA kind of cloth made in Ireland from pure undyed wool.runwaylikeResembling or characteristic of a runway.rupatadine(pharmacology) A second-generation antihistamine used to treat allergies.rupestrineGrowing on rocks or cliffs.rupicoline(zoology) Dwelling among the rocks.rupturableCapable of being ruptured.rusakovite(mineralogy) A monoclinic mineral containing aluminum, hydrogen, iron, oxygen, phosphorus, and vanadium.russellite(mineralogy) An orthorhombic-pyramidal mineral containing bismuth, oxygen, and tungsten.russetlikeResembling or characteristic of a russet potato.rusticwareAlternative spelling of rustic ware.rutinoside(organic chemistry) Any glycoside of rutinose.rutinuloseA particular disaccharide.