12-letter words containing e, o, n, i
- antitakeover — opposed to or acting against a takeover
- antiviolence — opposed to or acting against violence in society
- anton sailer — Anton [ahn-tohn] /ˈɑn toʊn/ (Show IPA), ("Toni") 1935–2009, Austrian skier.
- anxious seat — a bench near the preacher at revival meetings, for those with a troubled conscience who seek salvation
- apicomplexan — Describing protists of the phylum Apicomplexa.
- appellations — Plural form of appellation.
- apperception — the attainment of full awareness of a sensation or idea
- appointments — Plural form of appointment.
- appositeness — The state of being apposite.
- appreciation — Appreciation of something is the recognition and enjoyment of its good qualities.
- apprehension — Apprehension is a feeling of fear that something bad may happen.
- archdiocesan — Relating to an archdiocese.
- archegoniate — having archegonia
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- 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
- arctic ocean — the ocean surrounding the North Pole, north of the Arctic Circle. Area: about 14 100 000 sq km (5 440 000 sq miles)
- area bombing — aerial bombing in which bombs are dropped over the general area of a target.
- arfvedsonite — a type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
- ariel sharon — Ariel, 1928–2014, Israeli military and political leader; prime minister 2001–06.
- 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
- aristotelian — of or relating to Aristotle or his philosophy
- arpeggiation — the writing, playing or singing of arpeggios
- arseniferous — Lb geology Containing or producing arsenic.
- arsenopyrite — a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS
- ascensionist — a person who has completed a mountain ascent, esp a notable one
- assertations — Plural form of assertation.
- asseveration — the act of asseverating.
- assuefaction — the condition of being or becoming familiar with or used to something
- astonishable — (obsolete) Astonishing.
- astonishment — Astonishment is a feeling of great surprise.
- asynchronies — a lack of synchronism or coincidence in time.
- attorneyship — The office or profession of an attorney.
- au contraire — on the contrary
- auction sale — an instance of items being sold by auction
- auction site — a commercial website on which items are sold by internet auction
- auctioneered — Simple past tense and past participle of auctioneer.
- augmentation — the act of augmenting or the state of being augmented
- austronesian — of or relating to Austronesia, its peoples, or their languages
- autoinjector — A medical device designed to deliver a single dose of a particular, typically life-saving, drug.
- autumn olive — a spiny shrub (Elaeagnus umbellata) of the oleaster family, having leaves covered with silvery or brown scales
- ayuntamiento — (in Spain) a municipal council
- 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
- babingtonite — a rare, slightly magnetic, black or dark green silicate mineral, Ca2Fe2Si5O14OH, found in cavities in volcanic rock
- bacon-slicer — a machine for cutting bacon into slices
- balletomania — passionate enthusiasm for ballet
- balloon tire — a wide, deep-walled pneumatic tire with relatively low air pressure to lessen the shock of bumps
- balloon vine — a tropical tendril-climbing sapindaceous plant, Cardiospermum halicacabum, cultivated for its ornamental balloon-like seed capsules
- banderillero — a bullfighter's assistant who sticks banderillas into the bull
- bandoneonist — One who plays the bandoneon.
- bank deposit — money placed in a bank account