12-letter words containing h, o
- 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
- archosaurian — belonging to or characteristic of the archosaurs
- arctophilist — a collector of teddy bears
- ariel sharon — Ariel, 1928–2014, Israeli military and political leader; prime minister 2001–06.
- aristolochia — any of various plants of the genus Aristolochia of the family Aristolochiaceae
- 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.
- arithmomania — an obsessive desire to count objects, or a fixation with numbers and calculations
- aromatherapy — Aromatherapy is a type of treatment which involves massaging the body with special fragrant oils.
- array theory — (theory) A theory developed by Trenchard More Jr. and used as the basis for the NIAL language. Papers are available from the IBM Cambridge Scientific Center, Cambridge MA.
- arteriopathy — Any disease of the arteries.
- arthrobacter — a genus of rod-shaped or spherical bacteria found in the soil.
- 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.
- arthrotomies — Plural form of arthrotomy.
- aschoff body — any of the spindleshaped nodules found in heart tissue and associated with the myocarditis of rheumatic fever.
- ash-coloured — silver-grey in colour
- 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
- astonishable — (obsolete) Astonishing.
- astonishment — Astonishment is a feeling of great surprise.
- astrochemist — (chemistry, astronomy) A chemist or astronomer whose speciality is astrochemistry.
- astrophysics — Astrophysics is the study of the physical and chemical structure of the stars, planets, and other natural objects in space.
- asynchronies — a lack of synchronism or coincidence in time.
- asynchronism — a lack of synchronism; occurrence at different times
- asynchronous — An asynchronous electric machine is one in which the magnetic field and the rotation are not exactly the same.
- at all hours — If you say that something happens at all hours of the day or night, you disapprove of it happening at the time that it does or as often as it does.
- at the worst — bad or ill in the highest, greatest, or most extreme degree: the worst person.
- at wholesale — in large quantities
- atheological — having an aversion or resistance to theology
- atheoretical — having no connection with and not founded on theory
- atheromatous — a sebaceous cyst.
- atholl brose — a mixture of whisky and honey left to ferment before consumption
- athos, mount — autonomous monastic district occupying the tip of the easternmost prong of the Chalcidice peninsula, NE Greece: 130 sq mi (337 sq km); pop. 1,500
- athrocytosis — the capability of a cell to receive and store matter
- 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.
- atom smasher — accelerator (sense 3)
- attenborough — Sir David. born 1926, British naturalist and broadcaster; noted esp for his TV series Life on Earth (1978), The Living Planet (1983), The Life of Birds (1998), The Life of Mammals (2002), and First Life (2010)
- attorneyship — The office or profession of an attorney.
- atychiphobia — (rare) The fear of failure.
- auger shower — a shower of electrons, photons, etc. resulting from the collision of primary cosmic rays with atomic nuclei in the atmosphere
- 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.
- authorizable — able to be authorized