13-letter words containing s, i, o, u
- nudist colony — a place where group of nudists live together separated from the rest of the community
- numerologists — the study of numbers, as the figures designating the year of one's birth, to determine their supposed influence on one's life, future, etc.
- numismatology — Numismatics.
- nutrigenomics — the study of how individual genetic makeup interacts with diet, especially the effects of this interaction on a person's health.
- nutritionists — Plural form of nutritionist.
- obliviousness — unmindful; unconscious; unaware (usually followed by of or to): She was oblivious of his admiration.
- obnoxiousness — highly objectionable or offensive; odious: obnoxious behavior.
- obstructively — In an obstructive manner.
- obtrusiveness — having or showing a disposition to obtrude, as by imposing oneself or one's opinions on others.
- ocean sunfish — a brown and gray mola, Mola mola, inhabiting tropical and temperate seas, having the posterior half of the body sharply truncated behind the elongated dorsal and anal fins.
- oceanic crust — the brown, hard outer portion or surface of a loaf or slice of bread (distinguished from crumb).
- odoriferously — In an odoriferous manner.
- off soundings — in waters more than 100 fathoms in depth
- off-side rule — A lexical convention due to Landin, allowing the scope of declarations in a program to be expressed by indentation. Any non-whitespace token to the left of the first such token on the previous line is taken to be the start of a new declaration. Used in, for example, Miranda and Haskell.
- officiousness — objectionably aggressive in offering one's unrequested and unwanted services, help, or advice; meddlesome: an officious person.
- oil-based mud — Oil-based mud is a drilling fluid that is an emulsion containing oil as the base fluid.
- old ritualist — Raskolnik.
- ombudsmanship — The position or office of an ombudsman.
- one-upmanship — the art or practice of achieving, demonstrating, or assuming superiority in one's rivalry with a friend or opponent by obtaining privilege, status, status symbols, etc.: the one-upmanship of getting into the president's car pool.
- onus probandi — the burden of proof.
- open question — question: invites long answer
- open universe — a model of the universe in which the universe expands forever because there is not enough mass to counteract the expansion by means of gravitational attraction.
- opening hours — Opening hours are the times during which a shop, bank, library, or bar is open for business.
- opportunistic — adhering to a policy of opportunism; practicing opportunism.
- opportunities — Plural form of opportunity.
- opprobriously — In an opprobrious manner.
- optical mouse — (hardware) Any kind of mouse that uses visible light or infrared to detect changes in its position.
- optical sound — sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack.
- oral solution — An oral solution is a medicine in liquid form for drinking.
- ostreiculture — the breeding of oysters
- outdistancing — Present participle of outdistance.
- outlaw strike — wildcat strike.
- outprocessing — to end a military tour of duty, accompanied by necessary paperwork: All enlisted soldiers out-process as a class.
- outside-right — a footballer who plays on the outside right wing of the field
- outstandingly — prominent; conspicuous; striking: an outstanding example of courage.
- outstretching — Present participle of outstretch.
- outwash plain — Geology. a broad, sloping landform built of coalesced deposits of outwash.
- over-cautious — excessively or unnecessarily cautious: Sometimes it doesn't pay to be overcautious in business.
- over-effusive — unduly demonstrative; lacking reserve: effusive greetings; an effusive person.
- over-trusting — reliance on the integrity, strength, ability, surety, etc., of a person or thing; confidence.
- overambitious — having ambition; eagerly desirous of achieving or obtaining success, power, wealth, a specific goal, etc.: ambitious students.
- overconscious — excessively conscious
- overingenious — ingenious to a fault
- overinsurance — (of goods or property) insurance in excess of actual value
- overnourished — to sustain with food or nutriment; supply with what is necessary for life, health, and growth.
- overseriously — in an excessively serious manner
- overstimulate — to stimulate too much
- oversubscribe — to subscribe for more of than is available, expected, or required: The charity drive was oversubscribed by several thousand dollars.
- ovoviviparous — producing eggs that are hatched within the body, so that the young are born alive but without placental attachment, as certain reptiles or fishes.
- packing house — A packing house is a company that processes and packs food, especially meat, to be sold.