12-letter words starting with a
- aeromechanic — an aircraft mechanic
- aeromedicine — the medical treatment of disorders associated with air or space travel
- aeronautical — Aeronautical means involving or relating to the design and construction of aeroplanes.
- aeroneurosis — a functional disorder of aeroplane pilots characterized by anxiety and various psychosomatic disturbances, caused by insufficient oxygen at high altitudes and the emotional tension of flying
- aeroplankton — the tiny plants, animals, and bacteria living and floating in the air
- aerosiderite — a meteorite which is composed mainly of iron
- aerosol bomb — a metal receptacle, containing an inert gas under pressure, that sprays an insecticide, disinfectant, or the like when the gas is released by opening a valve.
- aesthesiogen — a substance that stimulates or produces sensation
- aesthetician — a student of aesthetics
- aestheticism — the doctrine that aesthetic principles are of supreme importance and that works of art should be judged accordingly
- aestheticist — a person devoted to aesthetics and the pursuit of beauty
- aestheticize — make aesthetic
- aethelred ii — ("Ethelred the Unready") a.d. 968?–1016, king of England 978–1013, 1014–1016.
- aethrioscope — an instrument which measures temperature changes caused by different conditions of the sky
- aetiological — of or relating to aetiology
- affamishment — (obsolete) starvation.
- affectations — Plural form of affectation.
- affectedness — assumed artificially; unnatural; feigned: affected sophistication; an affected British accent.
- affectionado — Misspelling of aficionado.
- affectionate — If you are affectionate, you show your love or fondness for another person in the way that you behave towards them.
- afficionados — Plural form of afficionado.
- affiliations — Plural form of affiliation.
- affine group — the group of all affine transformations of a finite-dimensional vector space.
- affirmations — Plural form of affirmation.
- affirmatives — Plural form of affirmative.
- afflictively — in a distressing, troublesome, or afflictive manner
- afforestable — having the capacity to be turned into forest
- affranchised — Simple past tense and past participle of affranchise.
- affrightedly — in a frightened or alarmed manner
- affrightment — the act of causing fear or alarm
- affrontingly — in an affronting manner
- afghan hound — a tall graceful breed of hound with a long silky coat
- aforestation — Alternative spelling of afforestation.
- aforethought — premeditated (esp in the phrase malice aforethought)
- african gray — an ashy-gray, African parrot, Psittacus erithacus, having a short, red tail, noted especially for its ability to mimic speech.
- african lily — an African plant (Agapanthus africanus) of the lily family with blue or white, funnel-shaped flowers
- african time — unpunctuality
- africanness' — Also, Africa. of or from Africa; belonging to the black peoples of Africa.
- afrikanerdom — (in South Africa) Afrikaner nationalism based on pride in the Afrikaans language and culture, conservative Calvinism, and a sense of heritage as pioneers
- afrikanerism — a word, term, or usage peculiar to or originating among Afrikaners.
- afro-asiatic — a family of languages of SW Asia and N Africa, consisting of the Semitic, ancient Egyptian, Berber, Cushitic, and Chadic subfamilies
- afro-british — of or relating to British people of African descent
- afrocentrism — centered on Africa or on African-derived cultures, as those of Brazil, Cuba, and Haiti: Afrocentric art.
- after a sort — to some extent
- after-dinner — immediately following dinner: an after-dinner speech.
- after-effect — The after-effects of an event, experience, or substance are the conditions which result from it.
- after-school — After-school activities are those that are organized for children in the afternoon or evening after they have finished school.
- afterburners — Plural form of afterburner.
- afterburning — a process in which additional fuel is ignited in the exhaust gases of a jet engine to produce additional thrust
- aftereffects — Plural form of aftereffect.