18-letter words containing a, n, r

north polar region — the region of land and water surrounding the North Pole.
north saskatchewan — a river in S central Canada, flowing E from the Rocky Mountains and joining the South Saskatchewan River to form the Saskatchewan River. 760 miles (1223 km) long.
north truchas peak — a mountain in N New Mexico, near Santa Fe: one of the three Truchas Peaks. 13,110 feet (3999 meters).
northeast by north — a point on the compass 11°15′ north of northeast. Abbreviation: NEbN.
northeast corridor — the long, narrow strip of land between Boston, New York City, and Washington, D.C., containing many adjacent urban areas.
northern cameroons — German Kamerun. a region in W Africa: a German protectorate 1884–1919; divided in 1919 into British and French mandates.
northern transvaal — province of South Africa, in the N part: 47,599 sq mi (123,280 sq km); pop. 5,202,000; cap. Pietersburg
norwegian elkhound — one of a breed of dogs having a short, compact body, short, pointed ears, and a thick, gray coat, raised originally in Norway for hunting elk and other game.
not a pretty sight — If you say that someone or something is not a pretty sight, you mean that it is not pleasant to look at.
not breathe a word — to take air, oxygen, etc., into the lungs and expel it; inhale and exhale; respire.
not have the heart — If you want to do something but do not have the heart to do it, you do not do it because you know it will make someone unhappy or disappointed.
noun incorporation — a process in word formation by which a compound is created by affixing or infixing a noun to a verb, as in baby-sit, house-hunt, and sleep-walk.
now you're talking — at last you're saying something agreeable
nuclear capability — If a country has nuclear capability, it is able to produce nuclear power and usually nuclear weapons.
nueva san salvador — Santa Tecla.
numerical analysis — the branch of mathematics dealing with methods for obtaining approximate numerical solutions of mathematical problems.
numerical aperture — a measure of the resolving power of a microscope, equal to the index of refraction of the medium in which the object is placed multiplied by the sine of the angle made with the axis by the most oblique ray entering the instrument, the resolving power increasing as the product increases. Abbreviation: N.A.
numerical identity — the relation that holds between two relata when they are the selfsame entity, that is, when the terms designating them have the same reference
numerical taxonomy — classification of organisms by a comparison of large numbers of observable characteristics that are given equal value instead of being weighted according to possible evolutionary significance.
nurse practitioner — a registered nurse who has received special training for diagnosing and treating routine or minor ailments. Abbreviation: NP.
nurse-practitioner — a registered nurse who has received special training for diagnosing and treating routine or minor ailments. Abbreviation: NP.
nursery facilities — places where young children are looked after
oak-leaf hydrangea — a shrub, Hydrangea quercifolia, of the southeastern U.S., having lobed leaves and pyramidal clusters of white flowers.
obedience training — the training of an animal, especially a dog, to obey certain commands.
object-orientation — object-oriented
occupational group — An occupational group is a category used by insurance companies to classify jobs according to how hazardous they are.
octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
of your own making — If you say that something such as a problem you have is of your own making, you mean you have caused or created it yourself.
off-street parking — spaces for cars located on private property rather than on a public street
offensive material — any published or broadcast content (such as articles, photographs, films, or websites) that is likely to be upsetting, insulting, or objectionable to some or most people
office of readings — the first of the canonical hours; matins
old low franconian — a Low German dialect of the Franks of the lower Rhine valley before c1100.
on delicate ground — in a situation requiring tact
on that/this score — You can use on that score or on this score to refer to something that has just been mentioned, especially an area of difficulty or concern.
on the back burner — low priority
on the danger list — critically ill in hospital
on the ragged edge — precariously close to loss of self-control, mental stability, etc.
one way or another — somehow, by some means
one's heart bleeds — used to express sympathetic grief, but often used ironically
one-banana problem — (jargon, abuse) At computer installations where the computers have operators for routine administrivia, the programmers and hardware people tend to look down on the operators and claim that a trained monkey could do their job. The incentives offered to said monkeys would then describe the difficulty of a task. A one-banana problem is simple; hence, "It's only a one-banana job at the most; what's taking them so long?" See also Infinite-Monkey Theorem.
open heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
open pandora's box — If someone or something opens Pandora's box or opens a Pandora's box, they do something that causes a lot of problems to appear that did not exist or were not known about before.
open-collar worker — (job) Someone who works at home or telecommutes.
open-heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
operating expenses — Operating expenses are expenses related to carrying out normal business activities.
operating software — software used in the operation of a computer system, typically by performing such tasks as memory allocation, job scheduling, and input/output control
operation overlord — the codename for the Allied invasion (June 1944) of northern France
operationalisation — Alternative spelling of operationalization.
operationalization — The act or process of operationalizing.
operations manager — business director

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