12-letter words containing r, a, d, o
- noncircadian — Not circadian.
- noneditorial — not relating to an editor or an editorial
- nonfederated — not federated
- nonhazardous — Not hazardous; safe.
- nonirrigated — not irrigated; dry
- nonladdering — (of garments made of knitted material) designed so that the interconnected stitches will not come undone if snagged
- nonlandowner — a person who does not own any land; a tenant
- nonmandatory — Not mandatory.
- nonredundant — not redundant
- nonregulated — Alternative spelling of non-regulated.
- nonstandards — Plural form of nonstandard.
- nonsteroidal — of or relating to a substance that is not a steroid but has certain similar physiological effects.
- noordbrabant — North Brabant
- noordholland — North Holland
- noradrenalin — norepinephrine.
- nordkyn cape — Cape, a cape in N Norway, E of North Cape: northernmost point of the European mainland.
- normed space — any vector space on which a norm is defined.
- north dakota — a state in the N central United States. 70,665 sq. mi. (183,020 sq. km). Capital: Bismarck. Abbreviation: ND (for use with zip code), N. Dak.
- north island — the northernmost principal island of New Zealand. 44,281 sq. mi. (114,690 sq. km).
- notice board — bulletin board for displaying public messages
- noticeboards — Plural form of noticeboard.
- nuevo laredo — a city in NE Mexico, on the Rio Grande opposite Laredo, Texas.
- oakland park — a town in S Florida.
- obdurateness — The characteristic of being obdurate; stubbornness.
- obedientiary — The holder of a monastic rank or office below that of superior.
- oboe d'amore — a type of oboe pitched a minor third lower than the oboe itself. It is used chiefly in the performance of baroque music
- oboe d'amour — an oboe with a bulb-shaped bell that is pitched a minor third below the range of the conventional oboe and was much used in music of the Baroque period.
- octahedrally — in an octahedral manner
- odd-man rush — an attacking move when the defence is outnumbered by the opposing team
- odontography — a treatise regarding the teeth
- odontophoran — a member of the family Odontophora
- off broadway — experimental or avant-garde drama produced in New York City, in small theaters, halls, churches, etc.
- off-broadway — experimental or avant-garde drama produced in New York City, in small theaters, halls, churches, etc.
- off-islander — a temporary or seasonal resident of an island; island visitor or tourist.
- oilseed rape — Oilseed rape is a plant with yellow flowers which is grown as a crop. Its seeds are crushed to make cooking oil.
- old favorite — If you refer to something as an old favorite, you mean that it has been in existence for a long time and everyone knows it or likes it.
- old guardism — political conservatism.
- old prussian — a Baltic language extinct since the 17th century. Abbreviation: OPruss.
- olivary body — one of two oval bodies or prominences composed of nerve tissue, one on each side of the anterior surface of the medulla oblongata.
- olla podrida — a spicy Spanish stew of sausage and other meat, chickpeas, and often tomatoes and other vegetables.
- on shipboard — on board a ship
- on the cards — likely
- onward march — the continuing, advancing or improving movement (of situation, etc)
- open-hearted — unreserved, candid, or frank: open-hearted advice.
- opera window — a narrow, fixed window on each side of the rear passenger compartment of an automobile.
- orange lodge — a Protestant fraternal organization based mainly in Northern Ireland and Scotland with lodges throughout the English-speaking world where there are significant Irish populations
- orbital road — a highway that circles a metropolitan area; ring road
- orchard bush — open savanna country with occasional trees and scrub, as found north of the W African forest belt
- orchestrated — Simple past tense and past participle of orchestrate.
- orchidaceous — belonging to the plant family Orchidaceae.