12-letter words containing o, r, n, a, t
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- 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)
- arfvedsonite — a type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
- 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.
- aristotelian — of or relating to Aristotle or his philosophy
- arithmomania — an obsessive desire to count objects, or a fixation with numbers and calculations
- arms control — an agreement between two or more countries to reduce the number of weapons owned, with the aim of preventing war
- around about — Around about means approximately.
- arpeggiation — the writing, playing or singing of arpeggios
- 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
- arson attack — an attack when property is set fire to
- articulation — Articulation is the action of producing a sound or word clearly, in speech or music.
- arts council — an organization that provides funding for a variety of arts activities
- aspirational — If you describe someone as aspirational, you mean that they have strong hopes of moving to a higher social status.
- assassinator — a person who assassinates
- assertations — Plural form of assertation.
- asseveration — the act of asseverating.
- assortedness — the position of being sorted, grouped or harmonized with, well or badly, or provided with a good or bad assortment or mixture
- astrodynamic — Pertaining to astrodynamics.
- astronautics — the science and technology of space flight
- astronomical — If you describe an amount, especially the cost of something as astronomical, you are emphasizing that it is very large indeed.
- astroturfing — a PR tactic used in politics and advertising in which actors are paid to display overt and apparently spontaneous grassroots support for a particular product, policy, or event
- atorvastatin — a statin, (C 33 H 34 FN 2 O 5) 2 ·Ca 3 H 2 O, used in the prevention and treatment of heart disease.
- 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.
- attributions — Plural form of attribution.
- au contraire — on the contrary
- auction room — a room in a building where auctions take place
- auctioneered — Simple past tense and past participle of auctioneer.
- austronesian — of or relating to Austronesia, its peoples, or their languages
- autoanalyzer — any of various automatic devices that test and analyze chemicals, blood, etc.
- autochangers — Plural form of autochanger.
- autographing — Present participle of autograph.
- autoinjector — A medical device designed to deliver a single dose of a particular, typically life-saving, drug.
- autorotation — the continuous rotation of a body in an airflow, such as that of the rotor blades of a helicopter in an unpowered descent
- averruncator — a long pair of shears used for pruning the higher branches of trees
- 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
- azithromycin — A macrolide antibiotic derived from erythromycin.
- baby monitor — a device that transmits sounds made by a baby to another room
- back country — The back country is an area that is a long way from any city and has very few people living in it.
- backcourtman — any of the players stationed in the backcourt; a guard
- bad scran to — bad luck to
- ball control — the skill of controlling the ball in a game such as football or tennis
- balloon tire — a wide, deep-walled pneumatic tire with relatively low air pressure to lessen the shock of bumps
- balloon tyre — a pneumatic tyre containing air at a relatively low pressure and having a wide tread
- banquet room — A banquet room is a room in a hotel where large formal meals for many people can be held.
- barbados nut — an ornamental, tropical American tree, Jatropha curcas, of the spurge family, having ivylike leaves, small, yellow or greenish-yellow flowers, and olive-shaped fruit yielding a purgative, poisonous oil.
- barnstormers — Plural form of barnstormer.
- barnstorming — A barnstorming performance is full of energy and very exciting to watch.