16-letter words containing n, e, o, r

obstreperousness — resisting control or restraint in a difficult manner; unruly.
occupation layer — (on an archaeological site) a layer of remains left by a single culture, from which the culture can be dated or identified.
oculomotor nerve — either one of the third pair of cranial nerves, consisting chiefly of motor fibers that innervate most of the muscles of the eyeball.
odds are against — If you say that the odds are against something or someone, you mean that they are unlikely to succeed.
oder-neisse line — the boundary between Poland and East Germany after World War II.
odontoid process — the toothlike upward projection at the back of the second vertebra of the neck
of a certain age — of an unspecified age, but no longer young
of the nature of — having the essential character of; like
off one's rocker — Also called runner. one of the curved pieces on which a cradle or a rocking chair rocks.
off one's stroke — performing or working less well than usual
off-by-one error — (programming) (Or "Obi-Wan error") An exceedingly common error induced in many ways, such as by starting at zero when you should have started at one or vice-versa, or by writing "< N" instead of "<= N" or vice-versa. Often confounded with fencepost error, which is properly a particular subtype of it. The term zeroth corrects the linguistic off-by-one error of, e.g., referring to the "1st" element of an array whose indexes start from zero.
ohm, georg simon — Georg Simon Ohm
ohmic resistance — resistance (def 3a).
oil storage tank — a very large industrial container where petroleum is stored
old north french — the dialect of Old French spoken in northern France. Abbreviation: ONF.
old world monkey — any of various anthropoid primates of the family Cercopithecidae, of Africa, the Arabian peninsula, and Asia, typically having a hairless face, forward- or downward-directed nostrils, relatively short arms, flat nails, and either having a rudimentary tail or using the tail for balance rather than grasping, and including the baboon, colobus monkey, guenon, langur, macaque, mandrill, mangabey, patas, proboscis, and talapoin.
old-girl network — an association among women that is comparable to or modeled on an old-boy network.
oligodendroglial — Of or pertaining to the oligodendroglia.
on (the) average — as an average quantity, rate, etc.
on a world scale — in a way that involves the whole world
on her beam-ends — (of a vessel) heeled over through an angle of 90°
on the breadline — impoverished; living at subsistence level
on the downgrade — waning in importance, popularity, health, etc
on the scrapheap — (of people or things) having outlived their usefulness
on the stroke of — punctually at
on your doorstep — If a place is on your doorstep, it is very near to where you live. If something happens on your doorstep, it happens very close to where you live.
onboard computer — onboard a vehicle, ship, plane, train or spacecraft
once and for all — former; having at one time been: the once and future king.
one for the book — a handwritten or printed work of fiction or nonfiction, usually on sheets of paper fastened or bound together within covers.
one for the road — a long, narrow stretch with a smoothed or paved surface, made for traveling by motor vehicle, carriage, etc., between two or more points; street or highway.
one with another — on average
one-armed bandit — slot machine (def 1).
one-party system — a political system in which only one party is allowed
online thesaurus — a thesaurus or dictionary of words with the same or nearly the same meanings, or synonyms, and their opposites, or antonyms, such as Thesaurus.com, available on the Internet or the World Wide Web, accessed through a web browser, and used by entering a query term into a search box on the site. An online thesaurus provides immediate electronic access to lists of alternate terms for the queried word, covering its various shades of meaning: This online thesaurus showed me that smart, as an adjective, not only means intelligent, but also stylish, or lively, and gave long lists of other words for each meaning.
open parenthesis — left parenthesis
open scholarship — a scholarship which anyone can apply for
open-die forging — Open-die forging is a forging process in which the flow of metal is not kept completely in the die.
opening ceremony — a ceremony held in celebration of the start of something
operating budget — money allocated to a project
operating income — revenue from business operations after operating expenses are deducted from gross income.
operating manual — a leaflet of instructions on how to use something (such as an electrical appliance, etc)
operating margin — An operating margin is a ratio used to measure how well a company controls its costs, that is calculated by dividing operating income by net sales, and expressing it as a percentage.
operating profit — the profit of a company, etc, after it deducts its operating costs or the costs necessary to conduct the business
operating system — (operating system) (OS) The low-level software which handles the interface to peripheral hardware, schedules tasks, allocates storage, and presents a default interface to the user when no application program is running. The OS may be split into a kernel which is always present and various system programs which use facilities provided by the kernel to perform higher-level house-keeping tasks, often acting as servers in a client-server relationship. Some would include a graphical user interface and window system as part of the OS, others would not. The operating system loader, BIOS, or other firmware required at boot time or when installing the operating system would generally not be considered part of the operating system, though this distinction is unclear in the case of a rommable operating system such as RISC OS. The facilities an operating system provides and its general design philosophy exert an extremely strong influence on programming style and on the technical cultures that grow up around the machines on which it runs. Example operating systems include 386BSD, AIX, AOS, Amoeba, Angel, Artemis microkernel, BeOS, Brazil, COS, CP/M, CTSS, Chorus, DACNOS, DOSEXEC 2, GCOS, GEORGE 3, GEOS, ITS, KAOS, Linux, LynxOS, MPV, MS-DOS, MVS, Mach, Macintosh operating system, Microsoft Windows, MINIX, Multics, Multipop-68, Novell NetWare, OS-9, OS/2, Pick, Plan 9, QNX, RISC OS, STING, System V, System/360, TOPS-10, TOPS-20, TRUSIX, TWENEX, TYMCOM-X, Thoth, Unix, VM/CMS, VMS, VRTX, VSTa, VxWorks, WAITS.
operating-system — the collection of software that directs a computer's operations, controlling and scheduling the execution of other programs, and managing storage, input/output, and communication resources. Abbreviation: OS.
operationalizing — Present participle of operationalize.
opposed-cylinder — (of an internal-combustion engine) having cylinders on opposite sides of the crankcase in the same plane
orange marmalade — preserve made from oranges
orange men's day — July 12, an annual celebration in Northern Ireland and certain cities having a large Irish section, especially Liverpool, to mark both the victory of William III over James II at the Battle of the Boyne, July 1, 1690, and the Battle of Augbrim, July 12, 1690.
order in council — (in Britain and various other Commonwealth countries) a decree of the Cabinet, usually made under the authority of a statute: in theory a decree of the sovereign and Privy Council

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