| homogamy | n. | inbreeding | ||
| homograph | n. | words spelled the same but with different etymology; words with identical spelling but different pronunciation | ||
| homologate | v. | to ratify, confirm, approve; to register a car model for international racing | ||
| hordeolum | n. | stye | biology | |
| horripilate | v. | to have the hairs of one’s skin stand on end, from cold or fear, etc. | ||
| horse-coper | n. | buyer and seller of horses, usu. of ill repute | ||
| hortatory | adj. | tending to encourage; exhorting | ||
| hot gospel | n. | of a church or preacher where services have an emotional or frothy bent, esp. of an evangelical denomination | British | |
| hotbox | n. | (also hot box) overheated axle bearing on rail cars and engines (railroads) | ||
| hough | n. | hollow behind the knee joint (in man), joint in rear leg above fetlock (in horses, cows, etc.) | ||
| houppelande | n. | medieval long-bodied outerwear, usually with full flared sleeves and sometimes trimmed with fur | ||
| howe | n. | barrow, tumulus | ||
| howsomever | adv. | to whatever extent, in whatever manner; nonetheless, notwithstanding | ||
| hoyden | n. | tomboy, romp; boorish or ill-bred girl | ||
| huarache | n. | leather Mexican sandal | ||
| huffy | adj. | quick to take offense; haughty; sulky | ||
| huggle | v. | to hug | obsolete | |
| hull down | adj. | of a ship seen so near the horizon that its hull is invisible and only its masts and superstructure may be discerned | nautical | |
| humbug | n. | striped hard candy, usu. peppermint flavored | British | |
| hundredweight | n. | weighing one hundred pounds; (British) weighing 112 pounds | ||
| hunker | v. | to squat on the heels with acutely bent haunches, knees, and ankles | ||
| hurdle | n. | sledge or frame upon which traitors or other criminals were dragged to their place of execution | ||
| hurple | v. | to crouch, to hunch over; to limp | obsolete | |
| husbandman | n. | farmer | ||
| hustings | n. | place where political candidates make speeches; political campaigning | ||
| hustle-cap | n. | old penny pitching game where coins are shaken in a cap | ||
| hyalescent | adj. | becoming translucent or transparent, turning or being hyaline | ||
| hyaline | adj. | transparent, glassy | ||
| hydromel | n. | weak mead | ||
| hydropathic | adj. | of or related to medical treatment by application of water both externally and internally | ||
| hygeian | adj. | sanitary; healthy | ||
| hygroscopic | adj. | absorbing moisture from the surrounding atmosphere | ||
| hylozoism | n. | belief that life is an inherent property of all matter | ||
| hylozoism | n. | theory that all matter has life, that life is merely a property of matter | ||
| hymeneal | adj. | of marriage; of the hymen | ||
| hymnody | n. | the singing or composition of hymns | ||
| hyperacusis | n. | hypersensitivity to sound, esp. loud noises | ||
| hyperekplexia | n. | condition characterized by overlarge startle response to unexpected stimuli | ||
| hyperemesis | n. | unstoppable vomiting | ||
| hyperesthesia | n. | excessive sensitivity of nerves, as to pain, etc.; algesia | ||
| hyperopia | n. | farsightedness | ||
| hypertrophy | n. | excessive growth or development | ||
| hypethral | adj. | (also hypaethral) open to the sky, without a roof | ||
| hyphema | n. | accumulation of blood within the front of the eyeball | ||
| hypocaust | n. | hollowed flooring into which heated air was sent to raise the temperature of a room or bath (in ancient Rome) | ||
| hypocephalus | n. | small disks placed beneath head of the dead in Late Period Egyptian funeral practice | ||
| hypochondria | n. | upper region of the abdomen, including the organs of the liver and the spleen | obsolete | |
| hypostatize | v. | to treat as a distinct object or reality | ||
| hypotaxis | n. | subordination of a clause to another | ||
| hypothermia | n. | body temperature lower than normal |
