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All 167 Matching Words

obfuscatorAgent noun of obfuscate; one who obfuscates.objurgatorOne who objurgates; a scolder or rebuker.oblationer(rare) One who makes an offering as an act of worship or reverence.oblongularOblong and rectangular; rectangular but not square.observator(obsolete) An observer.obstacularBeing or relating to an obstacle.obstructerAgent noun of obstruct: someone who obstructs.obstructorAlternative form of obstructer.oceanfarerSomeone who travels on the oceanoceanlinerAlternative spelling of ocean liner.oceanwaterThe water of the ocean.octacopper(chemistry, in combination) Eight atoms of copper in a chemical compound.octangularOctagonal, with eight angles.octasilver(chemistry, in combination) Eight silver atoms or ions in a compound (Ag₈).octasulfur(inorganic chemistry) The most common allotrope of sulfur (S₈), containing eight atoms in a ring.octilinear(mathematics) Composed of horizontal, vertical and/or diagonal (45 degrees) line segments onlyoctocopterAn unmanned rotorcraft having eight rotors.octopusherSomeone who plays octopush.oculimotorDated form of oculomotor.oculometerAn ocular micrometer used in oculometryoculomotor(anatomy, relational) Of or pertaining to movement of the eyeball.odorimeterAlternative form of odorometer.odorometerA device used to measure the intensity of a smellodynometerSynonym of algometer.officegoer(chiefly India) One who works in an office, an officer.officewearClothes designed to be worn while working in an office.officiatorA person who officiates.offspinnerAlternative form of off spinner.offworlderAlternative form of off-worlder.oilfielderOne who works on an oil field.oilpresserOne whose occupation is pressing the oil from seeds, olives, etc.oligodimerAn oligomer composed of dimersoligoester(organic chemistry) an ester oligomer chain containing a small number of repeating ester units (monomers). (Oligoesters are short analogs of polymeric polyesters.)oligoetherAny oligomer consisting of ether residuesoligosugarSynonym of oligosaccharide.ombitasvir(pharmacology) A particular antiviral drug for the treatment of hepatitis C virus.omnigenderTreating all genders as one or the same, not discriminating or distinguishing between them; unisex.oncodriverAny substance that "drives" cancer cells towards apoptosisoncofactorAny factor that affects the growth of a canceroncomarkerA biomarker that indicates the presence of canceronocentaurA centaur with the body of an ass, instead of a prototypical horse.opacimeterAny instrument that measures opacityoperameter(archaic) An instrument or machine for measuring work done, especially the number of rotations by a machine or wheel in manufacturing cloth.ophiolaterA snake-worshipper.opiniaster(obsolete) An opinionated person.opisometerA device for measuring the length of curved lines, such as on a map.opisthenar(medicine, anatomy, rare) The back of the hand.oppressourObsolete form of oppressor.opsiometer(historical) An old type of optometer.organellarOf or pertaining to organellesorganmakerA person who makes organs (musical instruments).orientatorAn instrument for orientating.originatorSomeone who originates, creates or founds something.ornamenterSomeone who ornaments; a decorator.ornamentorOne who ornaments.orographerA specialist in orography.orpailleurgold prospector, gold pannerorthoester(organic chemistry) Any compound, of general formula R-C(OR^')₃, having three alkoxy groups on a single carbon atomorthowaterSynonym of polywater.oscillatorA tuned electronic circuit used to generate a continuous output waveform.osmoceptorosmoreceptorosmosensor(biochemistry) Any of several classes of organic compound that undergo transitions between "off" and "on" conformations in response to changes in extracellular water activity (direct osmosensing) or resulting changes in cell structure (indirect osmosensing).ostentator(archaic) a boaster, ostentatious personosteologeran osteologist.osteometerA measuring instrument used in osteometryostraciserAlternative form of ostracizer.ostracizerOne who ostracizes.outblunder(transitive) To commit more or worse blunders than.outbluster(transitive) To surpass in blustering.outboarderOne who uses an outboard motor.outbreakerOne who breaks out; an escapee from prison.outbreederA plant or other organism that reproduces with a distantly related or unrelated individual.outbrotherAn outpensioner.outburster(astronomy) Any astronomical object that suddenly produces an outburst of radiation (especially radio waves)outbutcher(transitive) To slaughter more people than.outchamberAn outer or external chamber.outchatter(transitive) To chatter more than.outclamourAlternative form of outclamor.outcropper(mining) One who obtains coal from an outcrop, at or close to the surface.outcrosser(biology) An outcrossing speciesoutdeliver(transitive) To deliver more or better than.outdwellerOne who holds land in a parish, but lives elsewhere.outfielder(cricket, baseball) A player that plays in the outfield, which is the outer portion of the field.outfighter(boxing) A boxer who tends to keep a relatively large distance from their opponent.outflanker(military) One who is positioned so as to outflank the enemy in combat.outflatter(transitive) To exceed in flattery, to flatter more or better than.outglitter(transitive) To surpass in glitter or splendour.outharbour(Canada) In Newfoundland and Labrador, any city, town, or village having a harbour, other than the main port of St. John's.outscatter(computing) Synonym of backscatter.outsettlerSomeone who settles at a distance from others, i.e. in a periphery area.outskirterOne who lives on the outskirts.outslander(transitive) To surpass in slander.outsmarterOne who is better at outsmarting people than others; the victor in a battle of wits: trickster, strategist, manipulatoroutsourcerOne who outsources.outspeakerOne who speaks out.outstanderSomething outstandingly good.outswagger(transitive) To surpass in swaggering.outswinger(cricket) a ball that exhibits outswingoutthunder(transitive) To surpass in thundering; to thunder more, or more loudly, than.outworlder(science fiction, fantasy) One who comes from another planet, or from a society so culturally foreign as to be a different world.overauthorTo add too many names to the list of authors on a work produced by a team.overbearerone who overbears or is overbearingoverbidderOne who overbids.overbitterExcessively bitter.overblowerA musician who overblows.overbookerA company or individual who overbooks.overcaller(poker, bridge) One who overcalls.overcaster(bookbinding) One who overcasts.overcleverExcessively clever.overcollarA collar worn over another collar.overcolour(figurative, transitive) To exaggerate.overcookerOne who overcooks.overcoolerA device for cooling a substance to a temperature below its normal level.overcumber(transitive, dated) To overencumber.overcutter(mining) A device used to cut into rock walls from above.overdamper(music) A damper located above the hammers in a piano.overdrawer(economics) A person who overdraws, or has an overdraft.overdubberOne who overdubs.overfavourAlternative form of overfavor.overfeederOne who feeds too much.overfilterTo subject to overfiltration.overfisherOne who overfishes.overflavor(transitive) To flavor excessively.overflowerOne who, or that which, overflows.overhanger(architecture) One of the bricks forming an overhang.overhaulerOne who overhauls.overhearerOne who overhears.overheaterAn individual who tends to feel too hot.overlabourExcessive labour.overlanderOne who travels overland.overlapperOne who, or that which, overlaps.overlinger(intransitive) To linger or remain for too long.overloaderOne who or that which overloads.overlockerA device for overlock stitching.overlookerOne who overlooks; a work supervisor.overmaster(transitive) To overpower or overwhelm.overmatter(printing) Typeset material that proves to be surplus to requirements.overmother(transitive) To mother somebody too much; to mollycoddle.overnumber(transitive, archaic or non-native speakers' English) To outnumber.overpackerA person who overpacks.overpamper(transitive) To pamper excessively.overpepper(transitive) To season with too much pepper.overposter(Internet) A person who makes too many posts, for example on social media or a forum.overpowder(transitive) To use too much powder on.overreaderOne who overreads.overrunnerOne who, or that which, overruns.overseamer(sewing) A machine for overseaming.oversellerOne who oversells.oversharerOne who overshares.overshower(transitive) To shower from above; to dispense liberally to.oversilver(transitive) To cover with, or as if with, silver.overstaterA person who overstates.overstayerOne who overstays.oversummer(intransitive) To spend the summer (in a particular place or form).overtalkerOne who talks excessively.overtenderToo tender or sentimental.overtraderOne who overtrades.overturnerOne who, or that which, overturns.overwander(transitive, poetic) To wander or travel over.overweenerSomeone who overweens.overwinter(transitive) To keep or preserve for the winter.overwriter(computing) Software that writes over the contents or unused section of a data store to prevent recovery of sensitive information.ovipositor(zoology) A tubular protruding organ for laying eggs.oxocamphor(organic chemistry) Synonym of ketocamphor.oxycamphorAn oxidation product of camphor, used in treating dyspnea.oxygenatorany device that releases oxygen (or air) into water, especially one in an aquariumozonometerAn instrument for measuring how much ozone is present in a mixture of gases.