9-letter words containing o, n, s, a
- arccosine — the function the value of which for a given argument between –1 and 1 is the angle in radians (between 0 and π), the cosine of which is that argument: the inverse of the cosine function
- archstone — a wedge-shaped stone forming the curved part of an arch
- arcsecond — unit used in astronomy
- argentous — of or containing silver in the monovalent state
- argonauts — Classical Mythology. a member of the band of men who sailed to Colchis with Jason in the ship Argo in search of the Golden Fleece.
- armstrong — Edwin Howard. 1890–1954, US electrical engineer; invented the superheterodyne radio receiver and the FM radio
- arnoldson — Klas Pontus [klahs pawn-tuh s] /klɑs ˈpɔn təs/ (Show IPA), 1844–1916, Swedish author and politician: Nobel Peace Prize 1908.
- arsenious — of or containing arsenic in the trivalent state
- arsonists — Plural form of arsonist.
- asbomania — the perceived indiscriminate and excessive use by the authorities of anti-social behaviour orders in dealing with people causing a nuisance to their fellow citizens
- ascension — In some religions, when someone goes to heaven, you can refer to their ascension to heaven.
- ascogonia — Plural form of ascogonium.
- ash blond — a very light blond colour
- ash-blond — pale, grayish blond: ash-blond hair.
- ashburton — 1st Baron, Baring, Alexander.
- asimovian — referring to or reminiscent of the work of Isaac Asimov
- aspersion — a disparaging or malicious remark; slanderous accusation (esp in the phrase cast aspersions (on))
- assay ton — a unit of weight used in assaying ore, equivalent to 29.167 grams.
- assertion — a positive statement, usually made without an attempt at furnishing evidence
- assoiling — Present participle of assoil.
- assonance — the use of the same vowel sound with different consonants or the same consonant with different vowels in successive words or stressed syllables, as in a line of verse. Examples are time and light or mystery and mastery
- assonated — Simple past tense and past participle of assonate.
- assorting — Present participle of assort.
- astonying — Present participle of astony.
- astounded — If you are astounded by something, you are very shocked or surprised that it could exist or happen.
- astronaut — An astronaut is a person who is trained for travelling in a spacecraft.
- astronomy — Astronomy is the scientific study of the stars, planets, and other natural objects in space.
- asyndeton — the omission of a conjunction between the parts of a sentence
- atonalism — atonality.
- atonalist — a composer who composes without knowingly or being aware of alluding to a particular tone or scale
- attorneys — Plural form of attorney.
- attornies — Plural form of attorny.
- auditions — Plural form of audition.
- autobahns — Plural form of autobahn.
- autolysin — any agent that produces autolysis
- aversions — Plural form of aversion.
- ayr stone — a fine-grained stone used for polishing marble and as a whetstone.
- baboonish — resembling a baboon
- backbones — Plural form of backbone.
- backdowns — Plural form of backdown.
- bakestone — a flat stone placed in or near an oven or fire, for baking cakes on
- balconies — Plural form of balcony.
- ballonets — Plural form of ballonet.
- bandboxes — Plural form of bandbox.
- bandobust — (in India and Pakistan) an arrangement
- bang goes — that is the end of
- bank shot — Basketball. a shot into the basket, made by rebounding the ball off the backboard.
- bankbooks — Plural form of bankbook.
- banknotes — Plural form of banknote.
- bankrolls — Plural form of bankroll.