18-letter words containing o, p, e, n, a, i

seafloor spreading — a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
seasonal promotion — Seasonal promotions are items marketed to customers at the appropriate time of year, such as coats in the winter and bathing suits in the summer.
secondary syphilis — the second stage of syphilis, characterized by eruptions of the skin and mucous membrane.
self-contemplation — the act or process of thinking about oneself or one's values, beliefs, behavior, etc.
self-preoccupation — the state of being preoccupied.
separation anxiety — the normal fear and apprehension expressed by infants when removed from their mothers or approached by strangers.
shape-note singing — a traditional style of a capella singing using shape-note notation.
shipping container — a large, strong container, usually of metal, used to store goods in during shipment
shunting operation — an operation in which rail coaches are manoeuvred
simple enumeration — a procedure for arriving at empirical generalizations by haphazard accumulation of positive instances.
sleeping policeman — a bump built across roads, esp in housing estates, to deter motorists from speeding
slow-motion replay — a showing again in slow motion of a sequence of action, esp of part of a sporting contest immediately after it happens
solitary sandpiper — a North American sandpiper, Tringa solitaria, of inland wetlands, having a brownish-gray, white-spotted back and whitish underparts.
something to spare — a surplus of something
spaghetti junction — an interchange, usually between motorways, in which there are a large number of underpasses and overpasses and intersecting roads used by a large volume of high-speed traffic
spanish succession — War of thea war (1701-14) between European powers disputing the succession to the Spanish throne
special collection — a collection of materials segregated from a general library collection according to form, subject, age, condition, rarity, source, or value.
sperry corporation — (company) The company which merged with the Burroughs Corporation to form Unisys Corporation. Divisions included Sperry Univac, Sperry Flight Systems, and others. Some of these were sold off after the merger.
spread one's wings — to make full use of one's abilities
stepping-off place — jumping-off place (def 2).
summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
super giant slalom — a slalom race in which the course is longer and has more widely spaced gates than in a giant slalom.
superior vena cava — See under vena cava.
supporting actress — an actress playing a supporting role
system-programming — a program, as an operating system, compiler, or utility program, that controls some aspect of the operation of a computer (opposed to application program).
systematic phoneme — a phonological unit in generative phonology representing an underlying form that takes into account the relationship between phonological patterns and morphological variation, as the unit underlying the second vowel in both derive and derivative.
talent competition — a contest in which people compete by showcasing their talents, for example in singing, dancing, acrobatics, etc
television company — a company that broadcasts programmes by television
temporal summation — the act or process of summing.
to cast aspersions — If you cast aspersions on someone or something, you suggest that they are not very good in some way.
to fall into place — If things fall into place, events happen naturally to produce a situation you want.
to lick into shape — If you lick, knock, or whip someone or something into shape, you use whatever methods are necessary to change or improve them so that they are in the condition that you want them to be in.
to pick and choose — If you pick and choose, you carefully choose only things that you really want and reject the others.
to scrape a living — If you say that someone scrapes a living or scratches a living, you mean that they manage to earn enough to live on, but it is very difficult. In American English, you say they scrape out a living or scratch out a living.
to speak your mind — If you speak your mind, you say firmly and honestly what you think about a situation, even if this may offend or upset people.
to spill the beans — If you spill the beans, you tell someone something that people have been trying to keep secret.
traditional weapon — a weapon having ceremonial tribal significance, such as an assegai or knobkerrie
transient response — A transient response of a circuit is a temporary change in the way that it behaves due to an external excitation, that will disappear with time.
transporter bridge — a bridge for carrying passengers and vehicles by means of a platform suspended from a trolley.
under-compensation — to compensate or pay less than is fair, customary, or expected.
under-depreciation — decrease in value due to wear and tear, decay, decline in price, etc.
unfair competition — acts done by a seller to confuse or deceive the public with intent to acquire a larger portion of the market, as by cutting prices below cost, misleading advertising, selling a spurious product under a false identity, etc.
unit magnetic pole — the unit of magnetic pole strength equal to the strength of a magnetic pole that repels a similar pole with a force of one dyne, the two poles being placed in a vacuum and separated by a distance of one centimeter.
universal coupling — a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.
upper partial tone — overtone (def 1).
vanadium pentoxide — a yellow to red crystalline compound, V 2 O 5 , slightly soluble in water, used as a catalyst for organic reactions, in glass to absorb ultraviolet radiation, and as a photographic developer.
vermiform appendix — a narrow, blind tube protruding from the cecum, having no known useful function, in humans being 3 to 4 inches (8 to 10 cm) long and situated in the lower right-hand part of the abdomen.
wild passionflower — the maypop, Passiflora incarnata.
wilson's phalarope — a phalarope, Phalaropus tricolor, that breeds in the prairie regions of North America and winters in Argentina and Chile.
women at point sur — a narrative poem (1927) by Robinson Jeffers.

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