| flavourous | (adjective) full of flavor | Synonyms: flavorful, flavorous, flavorsome, flavourful, flavoursome, sapid, saporous |
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| foolproof | (adjective) not liable to failure | Synonyms: unfailing |
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| fossiliferous | (adjective) bearing or containing fossils | - |
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| frolicky | (adjective) given to merry frolicking | Synonyms: coltish, frolicsome, rollicking, sportive |
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| frolicsome | (adjective) given to merry frolicking | Synonyms: coltish, frolicky, rollicking, sportive |
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| front | (adjective) relating to or located in the front | - |
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| frontal | (adjective) of or relating to the front of an advancing mass of air | - |
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| (adjective) meeting front to front | Synonyms: head-on |
| (adjective) belonging to the front part | - |
| (adjective) of or adjacent to the forehead or frontal bone | - |
| frontmost | (adjective) preceding all others in spatial position | Synonyms: foremost |
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| frore | (adjective) very cold | - |
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| frostbitten | (adjective) injured by freezing or partial freezing | - |
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| frosted | (adjective) (of glass) having a roughened coating resembling frost | - |
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| frosty | (adjective) devoid of warmth and cordiality; expressive of unfriendliness or disdain | Synonyms: frigid, frozen, glacial, icy, wintry |
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| (adjective) pleasantly cold and invigorating | Synonyms: crisp, nipping, nippy, snappy |
| (adjective) covered with frost | Synonyms: rimed, rimy |
| frothing | (adjective) producing or covered with lathery sweat or saliva from exhaustion or disease | Synonyms: foaming, foamy |
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| frothy | (adjective) emitting or filled with bubbles as from carbonation or fermentation | Synonyms: bubbling, bubbly, effervescing, foaming, foamy, spumy |
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| (adjective) marked by high spirits or excitement | Synonyms: bubbling, effervescent, scintillating, sparkly |
| froward | (adjective) habitually disposed to disobedience and opposition | Synonyms: headstrong, self-willed, wilful, willful |
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| frowning | (adjective) showing displeasure or anger | - |
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| frowsty | (adjective) stale and unclean smelling | Synonyms: fusty, musty |
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| frowsy | (adjective) negligent of neatness especially in dress and person; habitually dirty and unkempt | Synonyms: frowzy, slovenly |
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| frowzled | (adjective) in disarray; extremely disorderly | Synonyms: disheveled, dishevelled, rumpled, tousled |
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| frowzy | (adjective) negligent of neatness especially in dress and person; habitually dirty and unkempt | Synonyms: frowsy, slovenly |
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| frozen | (adjective) turned into ice; affected by freezing or by long and severe cold | - |
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| (adjective) devoid of warmth and cordiality; expressive of unfriendliness or disdain | Synonyms: frigid, frosty, glacial, icy, wintry |
| (adjective) not convertible to cash | - |
| (adjective) absolutely still | Synonyms: rooted, stock-still |
| (adjective) (used of foods) preserved by freezing sufficiently rapidly to retain flavor and nutritional value | Synonyms: flash-frozen, quick-frozen |
| (adjective) incapable of being changed or moved or undone; e.g. "frozen prices" | Synonyms: fixed |
| (adjective) not thawed | - |
| fulgurous | (adjective) amazingly impressive; suggestive of the flashing of lightning | Synonyms: dazzling, eye-popping, fulgurant |
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| furrowed | (adjective) having long narrow shallow depressions (as grooves or wrinkles) in the surface | Synonyms: rugged |
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| gastroduodenal | (adjective) of or relating to the stomach and the duodenum | - |
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| gastroesophageal | (adjective) of or relating to or involving the stomach and esophagus | - |
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| gastrointestinal | (adjective) of or relating to the stomach and intestines | Synonyms: GI |
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| gastronomic | (adjective) of or relating to gastronomy | Synonyms: gastronomical |
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| gastronomical | (adjective) of or relating to gastronomy | Synonyms: gastronomic |
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| gemmiferous | (adjective) bearing or reproducing by a gemma | - |
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| generous | (adjective) willing to give and share unstintingly | - |
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| (adjective) not petty in character and mind | - |
| (adjective) more than is usual or necessary | - |
| geosynchronous | (adjective) of or having an orbit with a fixed period of 24 hours (although the position in the orbit may not be fixed with respect to the earth) | - |
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| gerontological | (adjective) of or relating to or practicing geriatrics | Synonyms: geriatric |
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| glabrous | (adjective) having no hair or similar growth; smooth | - |
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| glamorous | (adjective) having an air of allure, romance and excitement | Synonyms: glamourous |
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| glamourous | (adjective) having an air of allure, romance and excitement | Synonyms: glamorous |
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| glottochronological | (adjective) pertaining to the study of the evolution of languages from a common source | - |
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| gonadotrophic | (adjective) of or relating to or involving gonadotropin | Synonyms: gonadotropic |
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| gonadotropic | (adjective) of or relating to or involving gonadotropin | Synonyms: gonadotrophic |
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| granuliferous | (adjective) producing or full of granules | - |
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| grassroots | (adjective) fundamental | - |
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| (adjective) of or involving the common people as constituting a fundamental political and economic group | - |
| greaseproof | (adjective) resistant to penetration by grease or oil or wax | - |
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| groggy | (adjective) stunned or confused and slow to react (as from blows or drunkenness or exhaustion) | Synonyms: dazed, foggy, logy, stuporous |
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| groomed | (adjective) neat and smart in appearance; well cared for | - |
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| grooved | (adjective) established as if settled into a groove or rut | Synonyms: well-grooved |
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| groovy | (adjective) (British informal) very chic | Synonyms: swagger |
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| (adjective) excellent | Synonyms: bang-up, bully, corking, cracking, dandy, great, keen, neat, nifty, not bad, old, peachy, slap-up, smashing, swell |
| groping | (adjective) acting with uncertainty or hesitance or lack of confidence | - |
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| gross | (adjective) before any deductions | - |
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| (adjective) conspicuously and outrageously bad or reprehensible | Synonyms: crying, egregious, flagrant, glaring, rank |
| (adjective) repellently fat | Synonyms: porcine |
| (adjective) lacking fine distinctions or detail | - |
| (adjective) conspicuously and tastelessly indecent | Synonyms: crude, earthy, vulgar |
| (adjective) without qualification; used informally as (often pejorative) intensifiers | Synonyms: arrant, complete, consummate, double-dyed, everlasting, perfect, pure, sodding, staring, stark, thorough, thoroughgoing, unadulterated, utter |
| (adjective) visible to the naked eye (especially of rocks and anatomical features) | Synonyms: megascopic |
| grotesque | (adjective) ludicrously odd | Synonyms: antic, fantastic, fantastical |
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| (adjective) distorted and unnatural in shape or size; abnormal and hideous | Synonyms: monstrous |
| grotty | (adjective) very unpleasant or offensive | - |
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| grouchy | (adjective) annoyed and irritable | Synonyms: bad-tempered, crabbed, crabby, cross, fussy, grumpy, ill-tempered |
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| groundbreaking | (adjective) being or producing something like nothing done or experienced or created before | Synonyms: innovational, innovative |
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| groundless | (adjective) without a basis in reason or fact | Synonyms: baseless, idle, unfounded, unwarranted, wild |
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| grouped | (adjective) arranged into groups | Synonyms: sorted |
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| groveling | (adjective) totally submissive | Synonyms: cringing, grovelling, wormlike, wormy |
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| grovelling | (adjective) totally submissive | Synonyms: cringing, groveling, wormlike, wormy |
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| growing | (adjective) relating to or suitable for growth | - |
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| grown | (adjective) (of animals) fully developed | Synonyms: adult, big, full-grown, fully grown, grownup |
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| grownup | (adjective) (of animals) fully developed | Synonyms: adult, big, full-grown, fully grown, grown |
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| gynandromorphic | (adjective) having both male and female morphological characteristics | Synonyms: gynandromorphous |
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| gynandromorphous | (adjective) having both male and female morphological characteristics | Synonyms: gynandromorphic |
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| gyroscopic | (adjective) having the characteristics of a gyroscope | - |
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| harrowing | (adjective) extremely painful | Synonyms: agonising, agonizing, excruciating, torturesome, torturing, torturous |
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| headstrong | (adjective) habitually disposed to disobedience and opposition | Synonyms: froward, self-willed, wilful, willful |
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| heartbroken | (adjective) full of sorrow | Synonyms: brokenhearted, heartsick |
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| herbivorous | (adjective) feeding only on plants | - |
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| hermaphrodite | (adjective) of animal or plant; having both male female reproductive organs | Synonyms: hermaphroditic |
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| hermaphroditic | (adjective) of animal or plant; having both male female reproductive organs | Synonyms: hermaphrodite |
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| (adjective) of or relating to monoclinous plants | - |
| heroic | (adjective) relating to or characteristic of heroes of antiquity | - |
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| (adjective) having or displaying qualities appropriate for heroes | Synonyms: heroical |
| (adjective) showing extreme courage; especially of actions courageously undertaken in desperation as a last resort | Synonyms: desperate |
| (adjective) of behavior that is impressive and ambitious in scale or scope | Synonyms: expansive, grand |
| (adjective) very imposing or impressive; surpassing the ordinary (especially in size or scale) | Synonyms: epic, larger-than-life |
| heroical | (adjective) having or displaying qualities appropriate for heroes | Synonyms: heroic |
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| heterocercal | (adjective) possessing a tail with the upper lobe larger than the lower and with the vertebral column prolonged into the upper lobe | - |
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| heterocyclic | (adjective) containing a closed ring of atoms of which at least one is not a carbon atom | - |
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| heterodactyl | (adjective) (of bird feet) having the first and second toes directed backward the third and fourth forward | - |
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| heterodox | (adjective) characterized by departure from accepted beliefs or standards | Synonyms: dissident, heretical |
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| heterodyne | (adjective) of or relating to the beat produced by heterodyning two oscillations | - |
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| heteroecious | (adjective) of parasites; passing through different stages of the life cycle on different host species | - |
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| heterogeneous | (adjective) consisting of elements that are not of the same kind or nature | Synonyms: heterogenous |
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| (adjective) originating outside the body | Synonyms: heterogenous |
| heterogenous | (adjective) originating outside the body | Synonyms: heterogeneous |
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| (adjective) consisting of elements that are not of the same kind or nature | Synonyms: heterogeneous |
| heteroicous | (adjective) having several forms of gametoecia on the same plant | Synonyms: polygamous, polyoicous |
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| heterologic | (adjective) not corresponding in structure or evolutionary origin | Synonyms: heterological, heterologous |
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| heterological | (adjective) not corresponding in structure or evolutionary origin | Synonyms: heterologic, heterologous |
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| heterologous | (adjective) derived from organisms of a different but related species | - |
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| (adjective) not corresponding in structure or evolutionary origin | Synonyms: heterologic, heterological |
| heterometabolic | (adjective) (of an insect) undergoing incomplete metamorphosis in which the nymph is essentially like the adult and there is no pupal stage | Synonyms: heterometabolous |
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| heterometabolous | (adjective) (of an insect) undergoing incomplete metamorphosis in which the nymph is essentially like the adult and there is no pupal stage | Synonyms: heterometabolic |
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| heterosexual | (adjective) sexually attracted to members of the opposite sex | - |
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| heterosporous | (adjective) characterized by heterospory | - |
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| heterothermic | (adjective) of animals except birds and mammals; having body temperature that varies with the environment | Synonyms: ectothermic, poikilothermic, poikilothermous |
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| heterotrophic | (adjective) requiring organic compounds of carbon and nitrogen for nourishment | - |
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| heterozygous | (adjective) having dissimilar alleles at corresponding chromosomal loci | - |
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| hidrotic | (adjective) of or relating to sweat | - |
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| hieroglyphic | (adjective) written in or belonging to a writing system using pictorial symbols | Synonyms: hieroglyphical |
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| (adjective) resembling hieroglyphic writing | Synonyms: hieroglyphical |
| hieroglyphical | (adjective) written in or belonging to a writing system using pictorial symbols | Synonyms: hieroglyphic |
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| (adjective) resembling hieroglyphic writing | Synonyms: hieroglyphic |
| highbrow | (adjective) highly cultured or educated | Synonyms: highbrowed |
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| highbrowed | (adjective) highly cultured or educated | Synonyms: highbrow |
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| homegrown | (adjective) grown or originating in a particular place | - |
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| homochromatic | (adjective) (of light or other electromagnetic radiation) having only one wavelength | Synonyms: monochromatic |
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| homoerotic | (adjective) of or concerning homosexual love | - |
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| homosporous | (adjective) characterized by homospory | - |
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| housebroken | (adjective) (of pets) trained to urinate and defecate outside or in a special place | Synonyms: house-trained |
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| humorous | (adjective) full of or characterized by humor | Synonyms: humourous |
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| humourous | (adjective) full of or characterized by humor | Synonyms: humorous |
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