12-letter words containing h, a, p, o
- arapaho peak — a mountain in N Colorado, in the Front Range of the Rocky Mountains W of Boulder. 13,506 feet (4119 meters).
- arch support — a rigid support placed inside a shoe so that its molded form fits the arch of the foot and relieves strain on the muscles of the foot while walking, standing, etc.
- archeopteryx — A specimen of the species Archaeopteryx lithographica, being the earliest and most primitive known bird, representing a transition in the evolution of dinosaurs to birds.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- archipelagos — Plural form of archipelago.
- archiphoneme — an abstract linguistic unit representing two or more phonemes when the distinction between these has been neutralized: conventionally shown by a capital letter within slashes, as /T/ for /t/ and /d/ in German Rat and Rad
- arctophilist — a collector of teddy bears
- aristophanes — ?448–?380 bc, Greek comic dramatist, who satirized leading contemporary figures such as Socrates and Euripides. Eleven of his plays are extant, including The Clouds, The Frogs, The Birds, and Lysistrata
- aristophanic — 448?–385? b.c, Athenian comic dramatist.
- aromatherapy — Aromatherapy is a type of treatment which involves massaging the body with special fragrant oils.
- arteriopathy — Any disease of the arteries.
- arthrography — the X-ray examination of a joint after injection of a contrast medium into the joint space
- arthropathic — disease of the joints.
- arthroplasty — surgical repair of a diseased joint
- arthroscopes — Plural form of arthroscope.
- arthroscopic — the use of an arthroscope to diagnose an injury to or disease of a joint or to perform minor surgery on a joint.
- arthrospores — an isolated vegetative cell that has passed into a resting state, occurring in bacteria and not regarded as a true spore.
- asphalt rock — a rock formation, usually of limestone or sandstone, containing large amounts of bitumens.
- asphyxiation — Asphyxiation is a lack of oxygen in blood, which causes suffocation.
- assessorship — the occupation, post or duties of a person who assesses, advises, or estimates
- astrophysics — Astrophysics is the study of the physical and chemical structure of the stars, planets, and other natural objects in space.
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atmospherium — an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
- attorneyship — The office or profession of an attorney.
- atychiphobia — (rare) The fear of failure.
- australopith — (archaeology, anthropology, paleonotology) Of or pertaining to the extinct hominid primates, of the genus Australopithecus, from the Pleistocene period.
- autapomorphy — (cladistics) A derived trait that is unique to a particular taxon.
- autographing — Present participle of autograph.
- autohypnosis — the process or result of self-induced hypnosis
- autohypnotic — Of or pertaining to autohypnosis; self-hypnotizing.
- automorphism — the practice of seeing others as having the same characteristics as oneself
- azathioprine — a synthetic drug that suppresses the normal immune responses of the body and is administered orally during and after organ transplantation and also in certain types of autoimmune disease. Formula: C9H7N7O2S
- azophenylene — phenazine.
- bachelor pad — a flat in which a bachelor lives
- bachelorship — the state of being a bachelor; bachelorhood
- band of hope — a society promoting lifelong abstention from alcohol among young people: founded in Britain in 1847
- barophoresis — the diffusion of suspended particles at a rate dependent on external forces
- bathmophobia — The fear of stairs and slopes.
- bathophilous — (of an organism) living in very deep water
- betanaphthol — a colorless, crystalline isomer of naphthol, C10H8O, used as an antiseptic and parasiticide
- bibliography — A bibliography is a list of books on a particular subject.
- bibliophobia — an aversion to books
- biogeography — the branch of biology concerned with the geographical distribution of plants and animals
- biographical — Biographical facts, notes, or details are concerned with the events in someone's life.
- bishop's-cap — any of a genus (Mitella) of small woodland plants of the saxifrage family, with two-lobed seedcases shaped like a bishop's hat
- blastosphere — blastula
- boatsmanship — seamanship as applied to boats, especially rowboats and motorboats.
- bog asphodel — either of two liliaceous plants, Narthecium ossifragum of Europe or N. americanum of North America, that grow in boggy places and have small yellow flowers and grasslike leaves
- branch depot — one of a several depots receiving stock from the same central supplier