13-letter words containing o, n, s, a
- astronautical — of or relating to astronautics or astronauts.
- at a discount — below the regular price
- at loose ends — in an unsettled, disorganized, or confused condition
- at one's back — behind, esp in support or pursuit
- at one's best — in one's best mood, form, health, etc.
- at this point — at this moment in time
- 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.
- atrociousness — The state of being atrocious.
- auction house — a commercial company that specializes in selling items at auction
- audaciousness — Risky or daring behaviour.
- augmentations — Plural form of augmentation.
- 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
- austin dobson — (Henry) Austin, 1840–1921, English poet, biographer, and essayist.
- authorisation — Alternative spelling of authorization.
- autochthonous — (of rocks, deposits, etc) found where they and their constituents were formed
- autodigestion — (biology) The digestion of tissue by enzymes produced by the organism itself.
- automechanism — an automatic mechanical system or component, especially a device that operates automatically under predetermined conditions.
- autoresponder — A program that automatically generates a set response to all messages sent to a particular e-mail address.
- autumn crocus — a liliaceous plant, Colchicum autumnale, of Europe and N Africa having pink or purplish autumn flowers
- baba ghanoush — a thick purée of aubergines, tahini, olive oil, lemon juice, and garlic, originating in North Africa and the Mediterranean
- back emission — the secondary emission of electrons from an anode
- backbone site — A key Usenet, electronic mail and/or Internet site; one that processes a large amount of third-party traffic, especially if it is the home site of any of the regional coordinators for the Usenet maps. Notable backbone sites as of early 1993 include uunet and the mail machines at Rutgers University, UC Berkeley, DEC's Western Research Laboratories, Ohio State University and the University of Texas. Compare rib site, leaf site.
- backgrounders — Plural form of backgrounder.
- 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
- bacteriolysin — an antibody which, when it combines with bacterial cells, causes lysis of those cells, thus destroying them
- bail bondsman — an individual or firm that lends bail money to defendants awaiting trial
- baker's dozen — thirteen
- ballet lesson — a class in which ballet is taught
- balloon shade — a window shade that when raised is gathered into a series of puffy festoons created by inverted pleats in the fabric.
- banderilleros — Plural form of banderillero.
- bang goes sth — If you say bang goes something, you mean that it is now obvious that it cannot succeed or be achieved.
- bank discount — interest on a loan deducted from the principal amount when the loan is made and based on the loan's face value
- bank of issue — a bank, as a Federal Reserve Bank, empowered by a government to issue currency.
- banking hours — the hours during which a bank is open for business
- banking house — a more formal term for a bank
- barbarousness — The state or quality of being barbarous.
- barosinusitis — aerosinusitis.
- bartholinitis — Inflammation of Bartholin's cyst.
- base on balls — walk
- baseline cost — the projected cost for an undertaking at the time it is budgeted
- basement-rock — the undifferentiated assemblage of rock (basement rock) underlying the oldest stratified rocks in any region: usually crystalline, metamorphosed, and mostly, but not necessarily, Precambrian in age.
- basic fortran — (language) A subset of Fortran.
- bass response — the response of an audio reproduction system or component to low frequencies
- bass trombone — the lower-pitched of the two main types of trombone
- bass-baritone — a singer or voice in the bass range with baritone qualities
- battlegrounds — Plural form of battleground.
- bay of gdańsk — a wide inlet of the Baltic Sea on the N coast of Poland
- bay of naples — an inlet of the Tyrrhenian Sea in the SW coast of Italy