habitable – Fit to be dwelt in.
habitant – Dweller.
habitual – According to usual practice.
habitude – Customary relation or association.
hackney – To make stale or trite by repetition.
haggard – Worn and gaunt in appearance.
halcyon – Calm.
hale – Of sound and vigorous health.
handwriting – Penmanship.
hanger-on – A parasite.
happy-go-lucky – Improvident.
harangue – A tirade.
harass – To trouble with importunities, cares, or annoyances.
harbinger – One who or that which foreruns and announces the coming of any person or thing.
hard-hearted – Lacking pity or sympathy.
hardihood – Foolish daring.
harmonious – Concordant in sound.
havoc – Devastation.
hawthorn – A thorny shrub much used in England for hedges.
hazard – Risk.
head first – Precipitately, as in diving.
head foremost – Precipitately, as in diving.
heartrending – Very depressing.
heathenish – Irreligious.
heedless – Thoughtless.
heifer – A young cow.
heinous – Odiously sinful.
hemorrhage – Discharge of blood from a ruptured or wounded blood-vessel.
hemorrhoids – pl. Tumors composed of enlarged and thickened blood-vessels, at the lower end of the rectum.
henchman – A servile assistant and subordinate.
henpeck – To worry or harass by ill temper and petty annoyances.
heptagon – A figure having seven sides and seven angles.
heptarchy – A group of seven governments.
herbaceous – Having the character of a herb.
herbarium – A collection of dried plants scientifically arranged for study.
herbivorous – Feeding on herbs or other vegetable matter, as animals.
hereditary – Passing naturally from parent to child.
heredity – Transmission of physical or mental qualities, diseases, etc., from parent to offspring.
heresy – An opinion or doctrine subversive of settled beliefs or accepted principles.
heretic – One who holds opinions contrary to the recognized standards or tenets of any philosophy.
heritage – Birthright.
hernia – Protrusion of any internal organ in whole or in part from its normal position.
hesitancy – A pausing to consider.
hesitant – Vacillating.
hesitation – Vacillation.
heterodox – At variance with any commonly accepted doctrine or opinion.
heterogeneity – Unlikeness of constituent parts.
heterogeneous – Consisting of dissimilar elements or ingredients of different kinds.
heteromorphic – Deviating from the normal form or standard type.
hexangular – Having six angles.
hexapod – Having six feet.
hexagon – A figure with six angles.
hiatus – A break or vacancy where something necessary to supply the connection is wanting.
hibernal – Pertaining to winter.
Hibernian – Pertaining to Ireland, or its people.
hideous – Appalling.
hilarious – Boisterously merry.
hillock – A small hill or mound.
hinder – To obstruct.
hindmost – Farthest from the front.
hindrance – An obstacle.
hirsute – Having a hairy covering.
hoard – To gather and store away for the sake of accumulation.
hoarse – Having the voice harsh or rough, as from a cold or fatigue.
homage – Reverential regard or worship.
homogeneity – Congruity of the members or elements or parts.
homogeneous – Made up of similar parts or elements.
homologous – Identical in nature, make-up, or relation.
homonym – A word agreeing in sound with but different in meaning from another.
homophone – A word agreeing in sound with but different in meaning from another.
honorarium – A token fee or payment to a professional man for services.
hoodwink – To deceive.
horde – A gathered multitude of human beings.
hosiery – A stocking.
hospitable – Disposed to treat strangers or guests with generous kindness.
hospitality – The practice of receiving and entertaining strangers and guests with kindness.
hostility – Enmity.
huckster – One who retails small wares.
humane – Compassionate.
humanitarian – A philanthropist.
humanize – To make gentle or refined.
humbug – Anything intended or calculated to deceive or mislead.
humiliate – To put to shame.
hussar – A light-horse trooper armed with saber and carbine.
hustle – To move with haste and promptness.
hybrid – Cross-bred.
hydra – The seven- or nine-headed water-serpent slain by Hercules.
hydraulic – Involving the moving of water, of the force exerted by water in motion.
hydrodynamics – The branch of mechanics that treats of the dynamics of fluids.
hydroelectric – Pertaining to electricity developed water or steam.
hydromechanics – The mechanics of fluids.
hydrometer – An instrument for determining the density of solids and liquids by flotation.
hydrostatics – The branch of science that treats of the pressure and equilibrium of fluids.
hydrous – Watery.
hygiene – The branch of medical science that relates to improving health.
hypercritical – Faultfinding.
hypnosis – An artificial trance-sleep.
hypnotic – Tending to produce sleep.
hypnotism – An artificially induced somnambulistic state in which the mind readily acts on suggestion.
hypnotize – To produce a somnambulistic state in which the mind readily acts on suggestions.
hypocrisy – Extreme insincerity.
hypocrite – One who makes false professions of his views or beliefs.
hypodermic – Pertaining to the area under the skin.
hypotenuse – The side of a right-angled triangle opposite the right angle.
hypothesis – A proposition taken for granted as a premise from which to reach a conclusion.
hysteria – A nervous affection occurring typically in paroxysms of laughing and crying