| exporter | (noun) a businessperson who transports goods abroad (for sale) | - |
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| falter | (noun) the act of pausing uncertainly | Synonyms: faltering, hesitation, waver |
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| fathometer | (noun) depth finder for determining depth of water or a submerged object by means of ultrasound waves | Synonyms: sonic depth finder |
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| femtometer | (noun) a metric unit of length equal to one quadrillionth of a meter | Synonyms: femtometre, fermi |
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| fencesitter | (noun) a neutral or uncommitted person (especially in politics) | Synonyms: independent, mugwump |
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| fester | (noun) a sore that has become inflamed and formed pus | Synonyms: suppurating sore |
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| fetter | (noun) a shackle for the ankles or feet | Synonyms: hobble |
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| figeater | (noun) large greenish June beetle of southern United States | Synonyms: green June beetle |
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| fighter | (noun) a high-speed military or naval airplane designed to destroy enemy aircraft in the air | Synonyms: attack aircraft, fighter aircraft |
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| (noun) someone who fights (or is fighting) | Synonyms: battler, belligerent, combatant, scrapper |
| (noun) someone who fights for a cause | Synonyms: champion, hero, paladin |
| filibuster | (noun) (law) a tactic for delaying or obstructing legislation by making long speeches | - |
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| (noun) a legislator who gives long speeches in an effort to delay or obstruct legislation that he (or she) opposes | Synonyms: filibusterer |
| filter | (noun) device that removes something from whatever passes through it | - |
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| (noun) an electrical device that alters the frequency spectrum of signals passing through it | - |
| firefighter | (noun) a member of a fire department who tries to extinguish fires | Synonyms: fire-eater, fire fighter, fireman |
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| firelighter | (noun) (a piece of) a substance that burns easily and can be used to start a coal or coke fire | - |
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| firewater | (noun) any strong spirits (such as strong whisky or rum) | - |
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| fitter | (noun) someone who fits a garment to a particular person | - |
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| floater | (noun) an insurance policy covering loss of movable property (e.g. jewelry) regardless of its location | Synonyms: floating policy |
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| (noun) an object that floats or is capable of floating | - |
| (noun) a swimmer who floats in the water | - |
| (noun) a wanderer who has no established residence or visible means of support | Synonyms: clochard, drifter, vagabond, vagrant |
| (noun) a voter who votes illegally at different polling places in the same election | - |
| (noun) an employee who is reassigned from job to job as needed | - |
| (noun) a debt instrument with a variable interest rate tied to some other interest rate (e.g. the rate paid by T-bills) | - |
| (noun) spots before the eyes caused by opaque cell fragments in the vitreous humor and lens | Synonyms: musca volitans, muscae volitantes, spots |
| flouter | (noun) someone who jeers or mocks or treats something with contempt or calls out in derision | Synonyms: jeerer, mocker, scoffer |
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| fluster | (noun) a disposition that is confused or nervous and upset | Synonyms: perturbation |
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| flutter | (noun) the act of moving back and forth | Synonyms: flicker, waver |
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| (noun) the motion made by flapping up and down | Synonyms: flap, flapping, fluttering |
| (noun) abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block | - |
| (noun) a disorderly outburst or tumult | Synonyms: commotion, disruption, disturbance, hoo-ha, hoo-hah, hurly burly, kerfuffle, to-do |
| fluxmeter | (noun) meter that measures magnetic flux by the current it generates in a coil | - |
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| flyswatter | (noun) an implement with a flat part (of mesh or plastic) and a long handle; used to kill insects | Synonyms: flyswat, swatter |
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| fomenter | (noun) one who agitates; a political troublemaker | Synonyms: agitator |
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| footer | (noun) a printed note placed below the text on a printed page | Synonyms: footnote |
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| (noun) a person who travels by foot | Synonyms: pedestrian, walker |
| (noun) (used only in combinations) the height or length of something in feet | - |
| forecaster | (noun) someone who makes predictions of the future (usually on the basis of special knowledge) | Synonyms: predictor, prognosticator, soothsayer |
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| forequarter | (noun) the front half of a side of meat | - |
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| forester | (noun) someone trained in forestry | Synonyms: arboriculturist, tree farmer |
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| frankfurter | (noun) a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll | Synonyms: dog, frank, hot dog, hotdog, weenie, wiener, wienerwurst |
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| freebooter | (noun) someone who takes spoils or plunder (as in war) | Synonyms: despoiler, looter, pillager, plunderer, raider, spoiler |
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| freighter | (noun) a cargo ship | Synonyms: bottom, merchant ship, merchantman |
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| frequenter | (noun) a regular customer | Synonyms: patron |
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| freshwater | (noun) water that is not salty | Synonyms: fresh water |
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| fritter | (noun) small quantity of fried batter containing fruit or meat or vegetables | - |
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| gagster | (noun) someone who writes comic material for public performers | Synonyms: gagman, gagwriter |
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| gagwriter | (noun) someone who writes comic material for public performers | Synonyms: gagman, gagster |
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| gaiter | (noun) legging consisting of a cloth or leather covering for the leg from the knee to the ankle | - |
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| (noun) a cloth covering (a legging) that covers the instep and ankles | Synonyms: spat |
| (noun) a shoe covering the ankle with elastic gores in the sides | - |
| galvanometer | (noun) meter for detecting or comparing or measuring small electric currents | - |
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| gangster | (noun) a criminal who is a member of gang | Synonyms: mobster |
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| garroter | (noun) someone who kills by strangling | Synonyms: choker, garrotter, strangler, throttler |
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| garrotter | (noun) someone who kills by strangling | Synonyms: choker, garroter, strangler, throttler |
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| garter | (noun) a band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve) | Synonyms: supporter |
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| gasometer | (noun) a large gas-tight spherical or cylindrical tank for holding gas to be used as fuel | Synonyms: gas holder |
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| (noun) a meter for measuring the amount of gas flowing through a particular pipe | Synonyms: gas meter |
| gaussmeter | (noun) a meter to compare strengths of magnetic fields | Synonyms: magnetometer |
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| geometer | (noun) a mathematician specializing in geometry | Synonyms: geometrician |
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| ghostwriter | (noun) a writer who gives the credit of authorship to someone else | Synonyms: ghost |
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| glister | (noun) the quality of shining with a bright reflected light | Synonyms: glisten, glitter, scintillation, sparkle |
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| glitter | (noun) the quality of shining with a bright reflected light | Synonyms: glisten, glister, scintillation, sparkle |
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| (noun) the occurrence of a small flash or spark | Synonyms: coruscation, sparkle |
| globetrotter | (noun) someone who travels widely and often | Synonyms: world traveler |
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| goddaughter | (noun) a female godchild | - |
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| goiter | (noun) abnormally enlarged thyroid gland; can result from underproduction or overproduction of hormone or from a deficiency of iodine in the diet | Synonyms: goitre, struma, thyromegaly |
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| goldbeater | (noun) an artisan who beats gold into gold leaf | Synonyms: gold-beater |
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| goniometer | (noun) direction finder that determines the angular direction of incoming radio signals | - |
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| granddaughter | (noun) a female grandchild | - |
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| grandmaster | (noun) a player of exceptional or world class skill in chess or bridge | - |
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| granter | (noun) a person who grants or gives something | - |
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| grater | (noun) utensil with sharp perforations for shredding foods (as vegetables or cheese) | - |
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| gravimeter | (noun) a measuring instrument for determining the specific gravity of a liquid or solid | Synonyms: hydrometer |
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| (noun) a measuring instrument for measuring variations in the gravitational field of the earth | Synonyms: gravity meter |
| greeter | (noun) a person who greets | Synonyms: saluter, welcomer |
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| grifter | (noun) a person who swindles you by means of deception or fraud | Synonyms: chiseler, chiseller, defrauder, gouger, scammer, swindler |
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| grunter | (noun) domestic swine | Synonyms: hog, pig, squealer, Sus scrofa |
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| (noun) a person who grunts | - |
| gutter | (noun) a channel along the eaves or on the roof; collects and carries away rainwater | Synonyms: trough |
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| (noun) a tool for gutting fish | - |
| (noun) a worker who guts things (fish or buildings or cars etc.) | - |
| (noun) misfortune resulting in lost effort or money | Synonyms: sewer, toilet |
| hairsplitter | (noun) a disputant who makes unreasonably fine distinctions | - |
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| halobacter | (noun) halophiles in saline environments such as the Dead Sea or salt flats | Synonyms: halobacteria, halobacterium |
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| halter | (noun) either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight | Synonyms: balancer, haltere |
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| (noun) a woman's top that fastens behind the back and neck leaving the back and arms uncovered | - |
| (noun) rope or canvas headgear for a horse, with a rope for leading | Synonyms: hackamore |
| (noun) a rope that is used by a hangman to execute persons who have been condemned to death by hanging | Synonyms: hangman's halter, hangman's rope, hemp, hempen necktie |
| hamster | (noun) short-tailed Old World burrowing rodent with large cheek pouches | - |
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| harvester | (noun) farm machine that gathers a food crop from the fields | Synonyms: reaper |
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| (noun) someone who helps to gather the harvest | Synonyms: reaper |
| hater | (noun) a person who hates | - |
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| hatter | (noun) someone who makes and sells hats | Synonyms: hatmaker, milliner, modiste |
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| headcounter | (noun) someone who conducts surveys of public opinion | Synonyms: canvasser, poll taker, pollster |
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| headhunter | (noun) a savage who cuts off and preserves the heads of enemies as trophies | Synonyms: head-shrinker |
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| (noun) a recruiter of personnel (especially for corporations) | - |
| headmaster | (noun) presiding officer of a school | Synonyms: master, schoolmaster |
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| headwaiter | (noun) a dining-room attendant who is in charge of the waiters and the seating of customers | Synonyms: captain, maitre d', maitre d'hotel |
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| headwater | (noun) the source of a river | - |
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| heater | (noun) (baseball) a pitch thrown with maximum velocity | Synonyms: bullet, fastball, hummer, smoke |
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| (noun) device that heats water or supplies warmth to a room | Synonyms: warmer |
| hectoliter | (noun) a metric unit of volume or capacity equal to 100 liters | Synonyms: hectolitre, hl |
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| hectometer | (noun) a metric unit of length equal to 100 meters | Synonyms: hectometre, hm |
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| helicopter | (noun) an aircraft without wings that obtains its lift from the rotation of overhead blades | Synonyms: chopper, eggbeater, whirlybird |
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| heliometer | (noun) an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope | - |
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| hereafter | (noun) the time yet to come | Synonyms: future, futurity, time to come |
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| (noun) life after death | Synonyms: afterlife |
| hesitater | (noun) one who hesitates (usually out of fear) | Synonyms: hesitator, vacillator, waverer |
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| hexameter | (noun) a verse line having six metrical feet | - |
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| highlighter | (noun) a fluorescent marker used to mark important passages in a text | - |
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| (noun) a cosmetic used to highlight the eyes or cheekbones | - |
| highwater | (noun) the tide when the water is highest | Synonyms: high tide, high water |
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| hindquarter | (noun) the back half of a side of meat | - |
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| hipster | (noun) someone who rejects the established culture; advocates extreme liberalism in politics and lifestyle | Synonyms: flower child, hippie, hippy |
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| hitter | (noun) (baseball) a ballplayer who is batting | Synonyms: batsman, batter, slugger |
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| (noun) someone who hits | Synonyms: striker |
| hodometer | (noun) a meter that shows mileage traversed | Synonyms: mileometer, milometer, odometer |
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| hoister | (noun) an operator of a hoist | - |
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| holster | (noun) a sheath (usually leather) for carrying a handgun | - |
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| (noun) a belt with loops or slots for carrying small hand tools | - |
| hooter | (noun) nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes | Synonyms: bird of Minerva, bird of night, owl |
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| (noun) a device on an automobile for making a warning noise | Synonyms: automobile horn, car horn, horn, motor horn |
| (noun) informal terms for the nose | Synonyms: beak, honker, nozzle, schnoz, schnozzle, snoot, snout |
| housemaster | (noun) teacher in charge of a school boardinghouse | - |
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| huckster | (noun) a seller of shoddy goods | Synonyms: cheap-jack |
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| (noun) a person who writes radio or tv advertisements | - |
| hunter | (noun) a watch with a hinged metal lid to protect the crystal | Synonyms: hunting watch |
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| (noun) someone who hunts game | Synonyms: huntsman |
| (noun) a person who searches for something | - |
| hydrometer | (noun) a measuring instrument for determining the specific gravity of a liquid or solid | Synonyms: gravimeter |
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| hygrometer | (noun) measuring instrument for measuring the relative humidity of the atmosphere | - |
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| hymenopter | (noun) insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing | Synonyms: hymenopteran, hymenopteron, hymenopterous insect |
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| hypercoaster | (noun) a roller coaster that goes up 200 feet or higher and can catapult riders from 0 to 70 mph in 4 seconds by motors originally designed to launch rockets | - |
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| hypsometer | (noun) an altimeter that uses the boiling point of water to determine land elevation | - |
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| idolater | (noun) a person who worships idols | Synonyms: idol worshiper, idoliser, idolizer |
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| igniter | (noun) a device for lighting or igniting fuel or charges or fires | Synonyms: ignitor, light, lighter |
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| (noun) a substance used to ignite or kindle a fire | Synonyms: ignitor, lighter |
| importer | (noun) someone whose business involves importing goods from outside (especially from a foreign country) | - |
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