15-letter words containing r, d, o
- noncertificated — not possessing a certificate, not certified
- noncomputerized — not computerized or controlled by computers
- noncredentialed — not credentialed or lacking credentials
- noncreditworthy — Not creditworthy.
- nondegenerative — tending to degenerate.
- nondepartmental — not limited to or related to a specific department
- nondisciplinary — of, for, or constituting discipline; enforcing or administering discipline: disciplinary action.
- nondiscriminate — Not discriminate.
- nonincorporated — Not incorporated.
- nonmatriculated — not matriculated, not enrolled in an institution, esp a college or university
- nonmelodramatic — Not melodramatic.
- nonprecedential — Not precedential.
- nonreproducible — Unable to be reproduced; not reproducible.
- nonreproductive — Not able to reproduce; sterile.
- nonstandardized — Unstandardized.
- nordic combined — a competition for Nordic skiers comprising ski jumping and cross-country skiing events, the winner having the highest combined score.
- norethandrolone — An anabolic steroid.
- normally-closed — Normally-closed switch contacts are in a closed state at rest.
- north highlands — a town in central California, near Sacramento.
- north tonawanda — a city in W New York.
- northeastwardly — Towards the northeast.
- northwestwardly — Towards the northwest.
- not a dickybird — not a word; nothing
- nuclear-powered — powered by nuclear energy
- nuisance ground — a garbage dump.
- number one wood — driver (def 4).
- obedience trial — a competitive event at which a dog can progress toward a degree in obedience by demonstrating its ability to follow a prescribed series of commands.
- object-oriented — pertaining to or denoting a system, programming language, etc., that supports the use of objects, as an entire image, a routine, or a data structure.
- ocean greyhound — a fast ship, esp a liner
- odd permutation — a permutation of a set of n elements, x 1 , x 2 , …, xn, which permutes the product of all differences of the form (xi – xj), where i is less than j, into the negative of the product.
- odontorhynchous — (of birds) having toothlike ridges inside the beak
- odoriferousness — The quality of being odoriferous.
- of the order of — having an approximately specified size or quantity
- off one's guard — to keep safe from harm or danger; protect; watch over: to guard the ruler.
- oil of lavender — an essential oil distilled from lavender flowers, especially Lavandula angustifolia and L. stoechas, and used in perfumery.
- olbers' paradox — the paradox that if the universe consisted of an infinite number of stars equally distributed through space, then every line of sight would come from a star and the night sky would glow uniformly, which is observationally not true.
- old boy network — an exclusive network that links members of a profession, social class, or organization or the alumni of a particular school through which the individuals assist one another in business, politics, etc.
- old father time — time personified
- old high german — High German before 1100. Abbreviation: OHG.
- old man's beard — fringe tree.
- old-boy network — an exclusive network that links members of a profession, social class, or organization or the alumni of a particular school through which the individuals assist one another in business, politics, etc.
- old-man's-beard — fringe tree.
- oldenbarneveldt — Johan van. 1547–1619, Dutch statesman, regarded as a founder of Dutch independence; the leading figure (from 1586) in the United Provinces of the Netherlands: executed by Maurice of Nassau
- oligodendrocyte — A glial cell similar to an astrocyte but with fewer protuberances, concerned with the production of myelin in the central nervous system.
- oligodendroglia — Oligodendrocytes collectively.
- oligohydramnios — (medicine) A deficit of amniotic fluid in the amniotic sac, causing distinctive deformations of the foetus.
- oligosaccharide — any carbohydrate yielding few monosaccharides on hydrolysis, as two, three, or four.
- omnidirectional — sending or receiving signals in all directions: an omnidirectional microphone.
- on (the) record — recorded; publicly or officially declared or known
- on a razor edge — in an extremely precarious state