13-letter words containing i, n, o, r
- apron strings — If you say that someone is tied to another person's apron strings, you mean that they are controlled or influenced too much by the other person.
- arabian horse — one of a breed of horses, raised originally in Arabia and adjacent countries, noted for intelligence, grace, and speed.
- arabicization — the gradual change of a culture into one that incorporates Arab culture and/or speaks Arabic
- arachnephobia — Misspelling of arachnophobia.
- arachniphobia — Alternative form of arachnophobia.
- arachnivorous — Spider-eating.
- arachnoiditis — an inflammation of the arachnoid membrane
- arachnophobia — an abnormal fear of spiders
- arachnophobic — an abnormal or pathological fear of spiders.
- arbitrational — relating to, involving, or resulting from arbitration
- archaeologian — (archaic) An archaeologist.
- archidiaconal — of or relating to an archdeacon or his office
- architectonic — denoting, relating to, or having architectural qualities
- argentiferous — containing or bearing silver
- argumentation — Argumentation is the process of arguing in an organized or logical way, for example in philosophy.
- aridification — the process by which a humid region becomes increasingly dry, as by climatic change or human interference with the ecology.
- aristolochene — (organic compound) A bicyclic sesquiterpene produced by certain fungi.
- armor-plating — The armor-plating on a vehicle or building is the hard metal covering that is intended to protect it from gunfire and other missiles.
- aromatization — the conversion of aliphatic or alicyclic compounds to aromatic hydrocarbons.
- arsenous acid — a toxic white powder, As2O3, used to make other arsenic compounds, insecticides, and preservatives; white arsenic
- arteriovenous — of, relating to, or affecting an artery and a vein
- arthroconidia — Plural form of arthroconidium.
- articulations — Plural form of articulation.
- arundinaceous — resembling a reed
- aspirationals — Plural form of aspirational.
- assassinators — Plural form of assassinator.
- astereognosis — inability to recognize objects by touch
- astrodynamics — the study of the motion of natural and artificial bodies in space
- astronautical — of or relating to astronautics or astronauts.
- aten asteroid — one of a small group of asteroids whose orbits cross that of the earth and whose semimajor axes are smaller than that of the earth.
- athenagoras i — (Aristocles Spyrou) 1886–1972, Archbishop Ecumenical of Constantinople and Ecumenical Patriarch of the Greek Orthodox Church 1948–72.
- atherogenesis — (medicine) The formation of atheromas, especially on the walls of the arteries.
- atomic energy — nuclear energy
- atomic number — the number of protons in the nucleus of an atom of an element
- atrociousness — The state of being atrocious.
- attributional — of or relating to the act of attributing
- auctioneering — Present participle of auctioneer.
- audience room — a room for holding formal interviews or hearings.
- aum shinrikyo — a syncretistic Japanese cult combining elements of Buddhism, Hinduism, and Christianity, founded by Shoko Asahara in 1986; responsible for a number of murders and in particular a nerve-gas attack on the Tokyo underground in 1995
- authenticator — a person or thing that authenticates.
- authorisation — Alternative spelling of authorization.
- authoritarian — If you describe a person or an organization as authoritarian, you are critical of them controlling everything rather than letting people decide things for themselves.
- authorization — an authorizing or being authorized
- auto-injector — An auto-injector is a hypodermic syringe that you can use to inject yourself with a liquid.
- averruncation — the act of averting or turning away
- backformation — Alternative spelling of back-formation.
- backgrounding — Present participle of background.
- backing group — a group of musicians providing an instrumental or vocal accompaniment for a pop singer
- backing store — a computer storage device, usually a disk, that provides additional storage space for information so that it can be accessed and referred to when required and may be copied into the processor if needed
- backwardation — the difference between the spot price for a commodity, including rent and interest, and the forward price