18-letter words containing o, i, r, e, a

nocturnal emission — the release of semen during sleep, often during a sexual dream.
nominative-address — a noun naming the person to whom one is speaking.
non-characteristic — Also, characteristical. pertaining to, constituting, or indicating the character or peculiar quality of a person or thing; typical; distinctive: Red and gold are the characteristic colors of autumn.
non-conversational — able or ready to converse; given to conversation.
non-discriminative — constituting a particular quality, trait, or difference; characteristic; notable.
non-impact printer — a printer that creates images without mechanically impacting the page, as an ink-jet or laser printer.
non-inertial frame — a frame of reference that moves with the object, so that the moving object appears to violate Newton's laws of motion since it accelerates despite having no horizontal forces on it.
non-reconciliation — an act of reconciling, as when former enemies agree to an amicable truce.
non-representation — the act of representing.
nonachlorobiphenyl — (organic compound) Either of three isomers of the polychlorinated biphenyl containing nine chlorine atoms.
nonaggression pact — an agreement between two nations not to attack each other, usually for a specified period of years
noninterchangeable — That cannot be interchanged with another.
nonintercourse act — the act of Congress (1809) prohibiting all shipping and trade between the United States and British- or French-controlled ports.
nonpartisan league — a political organization of farmers, founded in North Dakota in 1915, and extending to many states west of the Mississippi, with the aim of influencing agricultural legislation in state legislatures.
nonpreferentialism — of, relating to, or of the nature of preference: preferential policies.
nonstriated muscle — smooth muscle
nonvolatile memory — computer memory that can retain stored information even when not powered, for example read-only memory
nord-pas-de-calais — a region of N France, on the Straits of Dover (the Pas de Calais): coal-mining, textile, and metallurgical industries
normally aspirated — A normally aspirated or naturally aspirated engine breathes air at atmospheric pressure.
north polar region — the region of land and water surrounding the North Pole.
northeast corridor — the long, narrow strip of land between Boston, New York City, and Washington, D.C., containing many adjacent urban areas.
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.
now you're talking — at last you're saying something agreeable
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.
obedience training — the training of an animal, especially a dog, to obey certain commands.
object-orientation — object-oriented
octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
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
officer of the day — an officer who has charge of the guard and prisoners on an assigned day at a military installation. Abbreviation: OD, O.D., O.O.D.
offset lithography — offset (def 6).
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 danger list — critically ill in hospital
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
optical brightener — an additive that dyes and brightens fabric or paper
optical carrier 12 — (networking) (OC-12) A SONET rate of 12 * 51.84 = 622.08 megabits per second.
optical carrier 48 — (networking) (OC-48) A SONET rate of 48 * 51.84 = 2488.32 megabits per second.
optical disc drive — optical disk drive
optical disk drive — (hardware) (Or "optical disc drive", "optical storage") A generic term for any device that reads and/or writes optical media, i.e. compact discs, DVDs and/or Blu-ray discs or future media that uses light (from a small laser) to read data off a removable, rotating disk. At least one such drive is commonly installed in most personal computers to allow them to play and/or record audio and video media and load and store data such as program installers. The floppy disk has been replaced by optical media due to its vastly greater capacity, e.g. 50,000 megabytes for a dual-layer blu-ray disc compared with 1.5 megabytes for a floppy (over 30,000 times as much).
optical microscope — traditional magnifying instrument

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