12-letter words containing a, r, o, n, i
- aggravations — Plural form of aggravation.
- aggregations — Plural form of aggregation.
- aggrupations — Plural form of aggrupation.
- agrobusiness — the businesses collectively associated with the production, processing, and distribution of agricultural products.
- agroindustry — an activity combining agriculture and industry
- aileron roll — a roll consisting of one or more rotations, usually controlled by the use of ailerons.
- air division — an organizational unit smaller than an air force, usually composed of a headquarters and two or more wings
- alcaptonuria — Alternative spelling of alkaptonuria.
- alkaptonuria — excessive excretion of homogentisic acid in the urine, caused by a hereditary abnormality of the metabolism of tyrosine and phenylalanine.
- allegorizing — Present participle of allegorize.
- alliteration — Alliteration is the use in speech or writing of several words close together which all begin with the same letter or sound.
- altercations — Plural form of altercation.
- alternations — Plural form of alternation.
- amazon river — a river in N South America, flowing E from the Peruvian Andes through N Brazil to the Atlantic Ocean: the largest river in the world in volume of water carried. 3900 miles (6280 km) long.
- ameliorating — Present participle of ameliorate.
- amelioration — the act or an instance of ameliorating or the state of being ameliorated
- amenorrhoeic — absence of the menses.
- amentiferous — bearing aments
- amethopterin — (now rare) Methotrexate.
- aminobutyric — (organic chemistry) Of or pertaining to any of several isomeric univalent radicals in which a hydrogen atom of a butyric radical is replaced by an amino group.
- amortisation — Alternative spelling of amortization.
- amortization — the process of amortizing a debt
- amortizement — a sloping top on a buttress, pillar, etc.
- amphotericin — an amphoteric antibiotic produced by the bacterium Streptomyces nodosus and used in the treatment of fungal infections.
- an iron fist — a cruel and unyielding attitude or approach
- anachronical — Not in the correct date order. Chronologically incorrect.
- anachronisms — Plural form of anachronism.
- anachronists — Plural form of anachronist.
- anaerobiosis — life in the absence of oxygen
- anaerobiotic — anaerobic
- anamorphosis — an image or drawing distorted in such a way that it becomes recognizable only when viewed in a specified manner or through a special device
- anaphrodisia — diminished sexual desire.
- anchor light — a 32-point light, visible from at least two miles away, shown at night near the bow and not more than 20 feet (6 meters) above the deck of a vessel lying at anchor.
- anchoritical — in the manner of or resembling an anchorite
- andragogical — the methods or techniques used to teach adults: Many educators believe that the principles of andragogy, as advanced by Malcolm Knowles, have great relevance to adult education; others are not so certain.
- androcentric — having or regarding man or the male sex as central or primary
- androclinium — clinandrium.
- androgenesis — a type of reproduction in insects and plants involving the development of an embryo that contains only paternal chromosomes
- androgenetic — related to androgenesis
- androgenized — Simple past tense and past participle of androgenize.
- androscoggin — a river flowing from NE New Hampshire through SW Maine into the Kennebec River. 171 miles (275 km) long.
- anemotropism — orientation in response to a current of air.
- angelo patri — Angelo [an-juh-loh] /ˈæn dʒəˌloʊ/ (Show IPA), 1877–1965, U.S. educator and writer, born in Italy.
- angiocarpous — being or having fruit contained in a vessel such as a shell
- angiographic — relating to or using angiography
- angiosarcoma — a rare, malignant tumour which grows rapidly in the blood vessels
- anguilliform — having the shape or form of an eel
- animal lover — a person who feels fondness for animals
- animatronics — a branch of film and theatre technology that combines traditional puppetry techniques with electronics to create lifelike animated effects
- anisomorphic — differing in the semantic scope of terms referring to the real world: for instance, English and Russian are anisomorphic with regard to colour terms, English treating light blue and navy blue as shades of one colour but Russian treating these two shades as unrelated