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

not lift a finger — any of the terminal members of the hand, especially one other than the thumb.
not mince matters — to speak frankly
not one's idea of — not what one regards as (hard work, a holiday, etc)
not spare oneself — to exert oneself to the full
not worth a whoop — worthless
nothing less than — You can use nothing less than to emphasize your next words, often indicating that something seems very surprising or important.
nothing more than — merely, solely
nuclear radiation — Physics. radiation in the form of elementary particles emitted by an atomic nucleus, as alpha rays or gamma rays, produced by decay of radioactive substances or by nuclear fission.
nuclear threshold — the point in war at which a combatant brings nuclear weapons into use
numerical control — control of a machine tool, or other device used in a manufacturing process, by a computer, other control circuitry, or recorded digital commands.
nursery education — education provided at a school for young children, usually from three to five years old
objectionableness — The quality of being objectionable.
observation tower — lookout, observation point
occipital condyle — a protrusion on the occipital bone of the skull that forms a joint with the first cervical vertebra, enabling the head to move relative to the neck.
octadecanoic acid — stearic acid.
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.
off-year election — (in the US) an election held in a year when a presidential election does not take place
office automation — a method or system of using automated or electronic equipment, as word processors and computers, in the operations of an office.
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)
omnia vincit amor — love conquers all things
omphalomesenteric — (anatomy) Of or pertaining to the umbilicus and mesentery.
on condition that — a particular mode of being of a person or thing; existing state; situation with respect to circumstances.
on one's deathbed — about to die
on someone's tail — following or shadowing someone closely
on speaking terms — the act, utterance, or discourse of a person who speaks.
on the barrelhead — upon being presented for sale; at the time of delivery
on the face of it — the front part of the head, from the forehead to the chin.
on the foundation — an endowment or legacy for the perpetual support of an institution such as a school or hospital
on the half shell — served raw, with seasonings, on a half shell
on the heavy side — tending to be too heavy
on the off chance — the absence of any cause of events that can be predicted, understood, or controlled: often personified or treated as a positive agency: Chance governs all.
on the off-chance — If you do something on the off-chance, you do it because you hope that it will succeed, although you think that this is unlikely.
on the other hand — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
on the pig's back — successful; established
on the wrong tack — a short, sharp-pointed nail, usually with a flat, broad head.
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-parent family — A one-parent family is a family that consists of one parent and his or her children living together.
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".
online dictionary — a dictionary that is available on the Internet or World Wide Web and accessed through a Web browser using a computer or a mobile device, primarily by typing a query term into a search box on the site. Online dictionaries like Dictionary.com offer immediate, direct access through large databases to a word's spelling and meanings, plus a host of ancillary information, including its variant spellings, pronunciation, inflected forms, origin, and derived forms, as well as supplementary notes on matters of interest or concern about how the word is used: Some people think online dictionaries will make print dictionaries obsolete.
onomatopoetically — the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
open-end mortgage — a mortgage agreement against which new sums of money may be borrowed under certain conditions.

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