17-letter words containing n, a, s, o

objectionableness — The quality of being objectionable.
observation tower — lookout, observation point
odds-on favourite — a person, team, horse, etc that is regarded as the most likely to win a competition
odour of sanctity — sanctimoniousness
of its own accord — If something happens of its own accord, it seems to happen by itself, without anyone making it happen.
off one's own bat — If someone does something off their own bat, they do it without anyone else suggesting it.
old age pensioner — An old age pensioner is a person who is old enough to receive an pension from their employer or the government.
old red sandstone — a thick sequence of sedimentary rock (generally, but not always, red) deposited in Britain and NW Europe during the Devonian period
old south arabian — a group of four closely related Semitic languages, having a writing system and used from about the eighth to the fifth centuries b.c. in the southern part of Arabia.
old spanish trail — an overland route from Santa Fe, N. Mex., to Los Angeles, Calif., first marked out in 1776 by Spanish explorers and missionaries.
olympic mountains — a mountain range in NW Washington: part of the Coast Range. Highest peak: Mount Olympus, 2427 m (7965 ft)
olympic peninsula — a large peninsula of W Washington
omphalomesenteric — (anatomy) Of or pertaining to the umbilicus and mesentery.
on a razor's edge — in an acute dilemma
on one's deathbed — about to die
on someone's back — criticizing or pestering someone
on someone's tail — following or shadowing someone closely
on speaking terms — the act, utterance, or discourse of a person who speaks.
on the half shell — served raw, with seasonings, on a half shell
on the heavy side — tending to be too heavy
on the pig's back — successful; established
on-street parking — parking (of a car, vehicle, etc) that is or is allowed to be done on a street
one of these days — at some future time
one size fits all — (of clothing) designed to fit people of a wide range of sizes.
one-size-fits-all — (of clothing) designed to fit people of a wide range of sizes.
one-time password — (security) (OTP) A security system that requires a new password every time a user authenticates themselves, thus protecting against an intruder replaying an intercepted password. OTP generates passwords using either the MD4 or MD5 hashing algorithms. The equivalent term "S/Key", developed by Bellcore, is a trademark of Telcordia Technologies, so the name OTP is used increasingly. See RFC 1760 - "The S/KEY One-Time Password System" and RFC 1938 - "A One-Time Password System".
opening arguments — the statements or arguments provided by lawyers at the beginning of a trial
operation sealion — the codename for Hitler's proposed invasion (1940) of Great Britain
operations centre — a centre where activities of a business, organization, etc, are administrated and take place
opisthobranchiate — (zoology) Of or pertaining to the Opisthobranchiata.
opportunistically — adhering to a policy of opportunism; practicing opportunism.
optical astronomy — the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light.
orange free state — a province in central Republic of South Africa: a Boer republic 1854–1900; a British colony (Orange River Colony, ) 1900–10. 49,647 sq. mi. (128,586 sq. km). Capital: Bloemfontein.
organ-pipe cactus — a treelike or columnar cactus, Lemaireocereus marginatus, of Mexico, having a central, erect spine surrounded by spreading spines in clusters of five to eight, and funnel-shaped, brownish-purple flowers.
organic chemistry — the branch of chemistry, originally limited to substances found only in living organisms, dealing with the compounds of carbon.
organic psychosis — a severe mental illness produced by damage to the brain, as a result of poisoning, alcoholism, disease, etc
organophosphorous — Misspelling of organophosphorus.
osculating circle — circle of curvature.
otolaryngologists — Plural form of otolaryngologist.
otto von bismarck — Otto von [ot-oh von;; German aw-toh fuh n] /ˈɒt oʊ vɒn;; German ˈɔ toʊ fən/ (Show IPA), 1815–98, German statesman: first chancellor of modern German Empire 1871–90.
out of all reason — unreasonable
out of one's head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
over-compensation — a pronounced striving to neutralize and conceal a strong but unacceptable character trait by substituting for it an opposite trait.
over-conservative — disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
overreach oneself — to fail because of trying to do more than one can
oversquare engine — An oversquare engine is an engine which has a cylinder bore that is larger than its stroke.
pacific northwest — the region of North America lying north of the Columbia River and west of the Rockies
paleoconservative — a person advocating an older, traditional type of conservatism, especially in politics.
papanicolaou test — Pap test.
parents anonymous — (in Britain) an association of local voluntary self-help groups offering help through an anonymous telephone service to parents who fear they will injure their children, or who have other problems in managing their children

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