12-letter words containing n, o, r, a
- heteropteran — A bug of the group Heteroptera.
- hexacarbonyl — (inorganic chemistry) Any compound having six carbonyl groups.
- hibernations — Plural form of hibernation.
- hierophanies — Plural form of hierophany.
- hierophantic — (in ancient Greece) an official expounder of rites of worship and sacrifice.
- high treason — treason against the sovereign or state.
- hippocentaur — Centaur.
- hippocrepian — (of an aquatic organism or plant) shaped like a horseshoe
- hire company — a company that hires things out to people
- histrionical — (British) Alternative form of histrionic.
- holothurians — Plural form of holothurian.
- home and dry — If you say that someone is, in British English home and dry, or in American English home free, you mean that they have been successful or that they are certain to be successful.
- homoromantic — Romantically attracted to those of the same gender.
- honey badger — ratel.
- honorability — (American spelling) Alternative form of honourability.
- hooray henry — a young upper-class man, often with affectedly hearty voice and manners
- hoover apron — a dresslike coverall for women that ties at the waist.
- hop hornbeam — any of several Eurasian and North American trees of the genus Ostrya, of the birch family, especially O. virginiana, bearing hoplike fruiting clusters.
- horatian ode — an ode consisting of several stanzas all of the same form.
- horizontally — at right angles to the vertical; parallel to level ground.
- horn antenna — a microwave aerial, formed by flaring out the end of a waveguide
- horn balance — an extension of an aircraft control surface that projects in front of the hinge providing aerodynamic assistance in moving the control
- horse around — a large, solid-hoofed, herbivorous quadruped, Equus caballus, domesticated since prehistoric times, bred in a number of varieties, and used for carrying or pulling loads, for riding, and for racing.
- horse manure — horse's excrement
- horse marine — (formerly) a marine mounted on horseback or a cavalryman doing duty on shipboard.
- horse racing — a contest of speed among horses that either are ridden by jockeys or pull sulkies and their drivers.
- horsemanship — the art, ability, skill, or manner of a horseman.
- house martin — a small European swallow, Delichon urbica, that builds its nest under the eaves of houses.
- housecleaner — Someone employed to clean a house.
- housepainter — A professional painter of houses.
- housetrained — Simple past tense and past participle of housetrain.
- housewarming — a party to celebrate a person's or family's move to a new home.
- 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.
- hydnocarpate — a salt or ester of hydnocarpic acid.
- hydrocarbons — any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH 4 , an alkene, ethylene, C 2 H 4 , an alkyne, acetylene, C 2 H 2 , or an aromatic compound, benzene, C 6 H 6 .
- hydrodynamic — pertaining to forces in or motions of liquids.
- hydrogenated — to combine or treat with hydrogen, especially to add hydrogen to the molecule of (an unsaturated organic compound).
- hydrogenates — Third-person singular simple present indicative form of hydrogenate.
- hydronautics — (nautical) The science of the design and construction of ships, their engines, and their instrumentation.
- hydronically — in a hydronic manner; in a manner relating to a heating system that uses water
- hydroplaning — a seaplane.
- hydrosalpinx — A distally blocked Fallopian tube filled with serous or clear fluid.
- hymenopteran — hymenopterous.
- hypersomniac — a tendency to sleep excessively.
- hypnotherapy — treatment of a symptom, disease, or addiction by means of hypnotism.
- hypochondria — Also, hypochondriasis [hahy-poh-kuh n-drahy-uh-sis] /ˌhaɪ poʊ kənˈdraɪ ə sɪs/ (Show IPA). Psychiatry. an excessive preoccupation with one's health, usually focusing on some particular symptom, as cardiac or gastric problems.
- hyponatremia — (medicine) An abnormally low concentration of sodium (or salt) in blood plasma.
- hypophrygian — (in medieval church music) of or relating to the fourth of the eight scales
- hypoplastron — the third lateral plate in the plastron of turtles