12-letter words containing a, r, i, o, t
- hexobarbital — a barbiturate with hypnotic and sedative properties
- hibernations — Plural form of hibernation.
- hidrocystoma — An adenoma of the sweat glands.
- hierogrammat — a writer of hierograms.
- hierophantic — (in ancient Greece) an official expounder of rites of worship and sacrifice.
- high treason — treason against the sovereign or state.
- hippocentaur — Centaur.
- histographic — a treatise on or description of organic tissues.
- historically — of, pertaining to, treating, or characteristic of history or past events: historical records; historical research.
- histrionical — (British) Alternative form of histrionic.
- hit the road — a long, narrow stretch with a smoothed or paved surface, made for traveling by motor vehicle, carriage, etc., between two or more points; street or highway.
- holophrastic — using or consisting of a single word that functions as a phrase or sentence.
- holothurians — Plural form of holothurian.
- homoromantic — Romantically attracted to those of the same gender.
- honorability — (American spelling) Alternative form of honourability.
- horatian ode — an ode consisting of several stanzas all of the same form.
- horizontally — at right angles to the vertical; parallel to level ground.
- horometrical — Relating to horometry.
- horse trials — a competitive sporting event at which riders have to show their skill in dressage, show-jumping, and cross-country
- horse's tail — burro's tail.
- house martin — a small European swallow, Delichon urbica, that builds its nest under the eaves of houses.
- housepainter — A professional painter of houses.
- housetrained — Simple past tense and past participle of housetrain.
- hovering act — an act forbidding or restricting the loitering of foreign or domestic vessels within the prescribed limits of a coastal nation.
- hyannis port — a town in SE Massachusetts, on Nantucket Sound: summer resort.
- hydatidiform — like or resembling a hydatid
- hydroelastic — undergoing a change in elasticity as a result of the flow of water or another fluid
- hydronautics — (nautical) The science of the design and construction of ships, their engines, and their instrumentation.
- hydrostatics — the branch of hydrodynamics that deals with the statics of fluids, usually confined to the equilibrium and pressure of liquids.
- hygrochastic — of or relating to the opening of a fruit or flower caused by water or moisture
- hyperchaotic — Of or pertaining to hyperchaos.
- hypocritical — of the nature of hypocrisy, or pretense of having virtues, beliefs, principles, etc., that one does not actually possess: The parent who has a “do what I say and not what I do” attitude can appear hypocritical to a child.
- hypogastrium — the lower and median part of the abdomen.
- hyponatremia — (medicine) An abnormally low concentration of sodium (or salt) in blood plasma.
- hysteromania — unusually increased sexual desire in a woman
- iatrochemist — a person who practises iatrochemistry
- iatrogenesis — (medicine) Any adverse effect (or complication) resulting from medical treatment.
- ibota privet — a Japanese spreading shrub, Ligustrum obtusifolium, of the olive family, having hairy leaves and nodding white flower clusters.
- ichthyolatry — The worship of fishes, or of fish-shaped idols.
- ichthyosaurs — Plural form of ichthyosaur.
- idolatrously — In an idolatrous manner.
- ignorantness — The state or quality of being ignorant; ignorance.
- il trovatore — an opera (1853) by Giuseppe Verdi.
- ill-assorted — badly matched; incompatible
- illuminators — Plural form of illuminator.
- illuminatory — Increasing informative qualities; explanatory.
- illustration — something that illustrates, as a picture in a book or magazine.
- illustrators — Plural form of illustrator.
- illustratory — Serving to illustrate.
- immigrations — Plural form of immigration.