| fanweed | (noun) foetid Eurasian weed having round flat pods; naturalized throughout North America | Synonyms: field pennycress, French weed, mithridate mustard, penny grass, stinkweed, Thlaspi arvense |
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| farsightedness | (noun) seeing ahead; knowing in advance; foreseeing | Synonyms: foresight, prevision, prospicience |
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| (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: hypermetropia, hypermetropy, hyperopia, longsightedness |
| (noun) a reduced ability to focus on near objects caused by loss of elasticity of the crystalline lens after age 45 | Synonyms: presbyopia |
| featherbed | (noun) a mattress stuffed with feathers | Synonyms: feather bed |
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| featherbedding | (noun) the practice (usually by a labor union) of requiring an employer to hire more workers than are required | - |
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| featheredge | (noun) a thin tapering edge | - |
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| fedayeen | (noun) (plural) Arab guerrillas who operate mainly against Israel | - |
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| fedelline | (noun) extremely fine pasta thinner than vermicelli | - |
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| federalisation | (noun) the act of being put under federal control | Synonyms: federalization |
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| (noun) the state of being under federal control | Synonyms: federalization |
| federalism | (noun) the idea of a federal organization of more or less self-governing units | - |
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| federalist | (noun) an advocate of federalism | - |
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| federalization | (noun) the act of being put under federal control | Synonyms: federalisation |
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| (noun) the state of being under federal control | Synonyms: federalisation |
| federation | (noun) the act of constituting a political unity out of a number of separate states or colonies or provinces so that each member retains the management of its internal affairs | - |
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| (noun) a union of political organizations | Synonyms: confederacy, confederation |
| (noun) an organization formed by merging several groups or parties | - |
| federita | (noun) a Sudanese sorghum having exceptionally large soft white grains | Synonyms: feterita, Sorghum vulgare caudatum |
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| fedora | (noun) a hat made of felt with a creased crown | Synonyms: felt hat, homburg, Stetson, trilby |
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| feeblemindedness | (noun) severe mental deficiency | - |
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| feed | (noun) food for domestic livestock | Synonyms: provender |
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| feedback | (noun) response to an inquiry or experiment | - |
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| (noun) the process in which part of the output of a system is returned to its input in order to regulate its further output | - |
| feedbag | (noun) a canvas bag that is used to feed an animal (such as a horse); covers the muzzle and fastens at the top of the head | Synonyms: nosebag |
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| feeder | (noun) an animal being fattened or suitable for fattening | - |
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| (noun) an animal that feeds on a particular source of food | - |
| (noun) a machine that automatically provides a supply of some material | Synonyms: self-feeder |
| (noun) an outdoor device that supplies food for wild birds | Synonyms: bird feeder, birdfeeder |
| (noun) a branch that flows into the main stream | Synonyms: affluent, confluent, tributary |
| (noun) someone who consumes food for nourishment | Synonyms: eater |
| feeding | (noun) the act of consuming food | Synonyms: eating |
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| (noun) the act of supplying food and nourishment | Synonyms: alimentation |
| feedlot | (noun) a building where livestock are fattened for market | - |
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| feedstock | (noun) the raw material that is required for some industrial process | - |
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| firedamp | (noun) a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air | - |
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| firedog | (noun) metal supports for logs in a fireplace | Synonyms: andiron, dog-iron, dog |
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| firedrake | (noun) a creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings | Synonyms: dragon, European dragon |
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| fireweed | (noun) tall North American perennial with creeping rootstocks and narrow leaves and spikes of pinkish-purple flowers occurring in great abundance in burned-over areas or recent clearings; an important honey plant | Synonyms: Epilobium angustifolium, giant willowherb, rosebay willowherb, wickup |
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| (noun) an American weedy plant with small white or greenish flowers | Synonyms: Erechtites hieracifolia |
| fissiped | (noun) terrestrial carnivores having toes separated to the base: dogs, cats, bears, badgers, raccoons | Synonyms: fissiped mammal |
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| fixedness | (noun) the quality of being fixed in place as by some firm attachment | Synonyms: fastness, fixity, fixture, secureness |
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| (noun) the quality of being fixed and unchangeable | Synonyms: unalterability |
| (noun) remaining in place | Synonyms: immobility, stationariness |
| flatbed | (noun) an open truck bed or trailer with no sides; used to carry large heavy objects | - |
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| (noun) freight car without permanent sides or roof | Synonyms: flat, flatcar |
| flaxseed | (noun) the seed of flax used as a source of oil | Synonyms: linseed |
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| fledgeling | (noun) young bird that has just fledged or become capable of flying | Synonyms: fledgling |
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| (noun) any new participant in some activity | Synonyms: entrant, fledgling, freshman, neophyte, newbie, newcomer, starter |
| fledgling | (noun) young bird that has just fledged or become capable of flying | Synonyms: fledgeling |
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| (noun) any new participant in some activity | Synonyms: entrant, fledgeling, freshman, neophyte, newbie, newcomer, starter |
| flowerbed | (noun) a bed in which flowers are growing | Synonyms: bed of flowers, flower bed |
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| footedness | (noun) the property of favoring one foot over the other (as in kicking a ball) | - |
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| foredeck | (noun) the deck between the bridge and the forecastle | - |
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| foredge | (noun) the part of a book that faces inward when the book is shelved; the part opposite the spine | Synonyms: fore edge |
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| foreknowledge | (noun) knowledge of an event before it occurs | Synonyms: precognition |
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| foresightedness | (noun) providence by virtue of planning prudently for the future | Synonyms: foresight, foresightfulness |
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| freedman | (noun) a male person who has been freed from slavery | - |
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| freedom | (noun) the condition of being free; the power to act or speak or think without externally imposed restraints | - |
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| (noun) immunity from an obligation or duty | Synonyms: exemption |
| freedperson | (noun) a person who has been freed from slavery | - |
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| freedwoman | (noun) a female person who has been freed from slavery | - |
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| friedcake | (noun) small cake in the form of a ring or twist or ball or strip fried in deep fat | - |
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| frostweed | (noun) perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts | Synonyms: Crocanthemum canadense, frost-weed, frostwort, Helianthemum canadense |
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| (noun) tall perennial herb having clusters of white flowers; the eastern United States | Synonyms: frost-weed, Verbesina virginica, Virginia crownbeard |
| gamedev | (noun) someone who develops a game | - |
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| gobbledygook | (noun) incomprehensible or pompous jargon of specialists | - |
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| governed | (noun) the body of people who are citizens of a particular government | - |
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| gravedigger | (noun) a person who earns a living by digging graves | - |
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| gravelweed | (noun) perennial herb with yellow flowers; southern and south central United States | Synonyms: Verbesina helianthoides |
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| greed | (noun) reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins) | Synonyms: avarice, avaritia, covetousness, rapacity |
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| (noun) excessive desire to acquire or possess more (especially more material wealth) than one needs or deserves | - |
| greediness | (noun) an excessive desire for wealth (usually in large amounts) | Synonyms: rapaciousness, voraciousness |
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| (noun) an excessive desire for food | Synonyms: hoggishness, piggishness |
| greenweed | (noun) small Eurasian shrub having clusters of yellow flowers that yield a dye; common as a weed in Britain and the United States; sometimes grown as an ornamental | Synonyms: dyer's-broom, dyer's greenweed, dyeweed, Genista tinctoria, whin, woadwaxen, woodwaxen |
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| groundspeed | (noun) the speed of an aircraft relative to the ground | - |
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| gulfweed | (noun) brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea | Synonyms: sargasso, sargassum, Sargassum bacciferum |
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| gumweed | (noun) any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock | Synonyms: gum plant, rosinweed, tarweed |
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| gypsyweed | (noun) common hairy European perennial with pale blue or lilac flowers in axillary racemes | Synonyms: common speedwell, Veronica officinalis |
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| halfheartedness | (noun) the characteristic of being half-hearted; not sincere; lacking full energy, effort, commitment, or resolve. | - |
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| handedness | (noun) the property of using one hand more than the other | Synonyms: laterality |
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| handicapped | (noun) people collectively who are crippled or otherwise physically handicapped | Synonyms: disabled |
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| hardheadedness | (noun) The characteristic of being stubborn or wilful. | - |
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| hardheartedness | (noun) an absence of concern for the welfare of others | Synonyms: coldheartedness, heartlessness |
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| hatred | (noun) the emotion of intense dislike; a feeling of dislike so strong that it demands action | Synonyms: hate |
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| hawkweed | (noun) any of numerous often hairy plants of the genus Hieracium having yellow or orange flowers that resemble the dandelion | - |
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| (noun) any of various plants of the genus Pilosella | - |
| hayseed | (noun) a person who is not very intelligent or interested in culture | Synonyms: bumpkin, chawbacon, hick, rube, yahoo, yokel |
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| heartseed | (noun) herbaceous vine of tropical America and Africa | Synonyms: Cardiospermum grandiflorum |
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| heavyheartedness | (noun) a feeling of dispirited melancholy | - |
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| hedge | (noun) a fence formed by a row of closely planted shrubs or bushes | Synonyms: hedgerow |
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| (noun) an intentionally noncommittal or ambiguous statement | Synonyms: hedging |
| (noun) any technique designed to reduce or eliminate financial risk; for example, taking two positions that will offset each other if prices change | Synonyms: hedging |
| hedgefund | (noun) a flexible investment company for a small number of large investors (usually the minimum investment is $1 million); can use high-risk techniques (not allowed for mutual funds) such as short-selling and heavy leveraging | Synonyms: hedge fund |
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| hedgehog | (noun) small nocturnal Old World mammal covered with both hair and protective spines | Synonyms: Erinaceus europaeus, Erinaceus europeaeus |
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| (noun) relatively large rodents with sharp erectile bristles mingled with the fur | Synonyms: porcupine |
| hedger | (noun) a gardener who takes care of and trims hedges | - |
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| (noun) someone who counterbalances one transaction (as a bet) against another in order to protect against loss | - |
| (noun) a respondent who avoids giving a clear direct answer | Synonyms: equivocator, tergiversator |
| hedgerow | (noun) a fence formed by a row of closely planted shrubs or bushes | Synonyms: hedge |
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| hedging | (noun) an intentionally noncommittal or ambiguous statement | Synonyms: hedge |
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| (noun) any technique designed to reduce or eliminate financial risk; for example, taking two positions that will offset each other if prices change | Synonyms: hedge |
| hediondilla | (noun) desert shrub of southwestern United States and New Mexico having persistent resinous aromatic foliage and small yellow flowers | Synonyms: coville, creosote bush, Larrea tridentata |
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| hedonism | (noun) an ethical system that evaluates the pursuit of pleasure as the highest good | - |
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| (noun) the pursuit of pleasure as a matter of ethical principle | - |
| hedonist | (noun) someone motivated by desires for sensual pleasures | Synonyms: pagan, pleasure seeker |
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| heed | (noun) paying particular notice (as to children or helpless people) | Synonyms: attentiveness, paying attention, regard |
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| heedfulness | (noun) the trait of staying aware of (paying close attention to) your responsibilities | Synonyms: mindfulness |
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| heedlessness | (noun) the trait of forgetting or ignoring your responsibilities | Synonyms: inadvertence, inadvertency, unmindfulness |
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| (noun) the trait of acting rashly and without prudence | Synonyms: mindlessness, rashness |
| (noun) a lack of attentiveness (as to children or helpless people) | Synonyms: inattentiveness |
| hereditament | (noun) any property (real or personal or mixed) that can be inherited | - |
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| hereditarianism | (noun) the philosophical doctrine that heredity is more important than environment in determining intellectual growth | - |
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| heredity | (noun) the total of inherited attributes | Synonyms: genetic endowment |
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| (noun) the biological process whereby genetic factors are transmitted from one generation to the next | - |
| hexahedron | (noun) any polyhedron having six plane faces | - |
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| hobbledehoy | (noun) an awkward bad-mannered adolescent boy | - |
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| hogweed | (noun) tall coarse plant having thick stems and cluster of white to purple flowers | Synonyms: cow parsnip, Heracleum sphondylium |
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| horseweed | (noun) common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron | Synonyms: Canadian fleabane, Conyza canadensis, Erigeron canadensis, fleabane |
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| (noun) erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States | Synonyms: Collinsonia canadensis, horse balm, richweed, stone-root, stone root, stoneroot |
| hotbed | (noun) a bed of earth covered with glass and heated by rotting manure to promote the growth of plants | - |
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| (noun) a situation that is ideal for rapid development (especially of something bad) | - |
| housedog | (noun) a dog trained to guard a house | - |
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| hundred | (noun) ten 10s | Synonyms: 100, C, century, one C |
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| hundredth | (noun) one part in a hundred equal parts | Synonyms: one-hundredth, one percent |
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| (noun) position 100 in a countable series of things | - |
| hundredweight | (noun) a British unit of weight equivalent to 112 pounds | Synonyms: cwt, long hundredweight |
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| (noun) a United States unit of weight equivalent to 100 pounds | Synonyms: cental, centner, cwt, quintal, short hundredweight |
| (noun) a unit of weight equal to 100 kilograms in the metric system | Synonyms: centner, doppelzentner, metric hundredweight |
| hurriedness | (noun) overly eager speed (and possible carelessness) | Synonyms: haste, hastiness, hurry, precipitation |
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| hypermedia | (noun) a multimedia system in which related items of information are connected and can be presented together | Synonyms: hypermedia system, interactive multimedia, interactive multimedia system |
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| hypnopedia | (noun) teaching during sleep (as by using recordings to teach a foreign language to someone who is asleep) | Synonyms: sleep-learning |
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| icosahedron | (noun) any polyhedron having twenty plane faces | - |
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| immediacy | (noun) the quickness of action or occurrence | Synonyms: immediateness, instancy, instantaneousness |
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| (noun) lack of an intervening or mediating agency | Synonyms: immediateness |
| (noun) immediate intuitive awareness | Synonyms: immediate apprehension |
| immediateness | (noun) the quickness of action or occurrence | Synonyms: immediacy, instancy, instantaneousness |
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| (noun) lack of an intervening or mediating agency | Synonyms: immediacy |
| impedance | (noun) a material's opposition to the flow of electric current; measured in ohms | Synonyms: electric resistance, electrical resistance, ohmic resistance, resistance, resistivity |
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| impediment | (noun) any structure that makes progress difficult | Synonyms: impedimenta, obstructer, obstruction, obstructor |
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| (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, baulk, check, deterrent, handicap, hinderance, hindrance |
| impedimenta | (noun) the baggage and equipment carried by an army | - |
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| (noun) any structure that makes progress difficult | Synonyms: impediment, obstructer, obstruction, obstructor |
| inbreeding | (noun) the act of mating closely related individuals | - |
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