16-letter words containing r, o, i, d
- nondiscretionary — subject or left to one's own discretion.
- norodom sihanouk — Prince Norodom [nawr-uh-dom,, -duh m] /ˈnɔr əˌdɒm,, -dəm/ (Show IPA), 1922–2004, Cambodian statesman: premier 1952–60; chief of state 1960–70 and 1975–76.
- north plainfield — a city in NE New Jersey.
- north providence — a town in NE Rhode Island.
- north ridgeville — a town in N Ohio.
- northern ireland — a political division of the United Kingdom, in the NE part of the island of Ireland. 5238 sq. mi. (13,565 sq. km). Capital: Belfast.
- norwegian buhund — a slightly-built medium-sized dog of a breed with erect pointed ears and a short thick tail carried curled over its back
- nusslein-volhard — Christiane [kris-tee-ah-nuh,, kris-tyah-] /ˌkrɪs tiˈɑ nə,, krɪsˈtyɑ-/ (Show IPA), born 1942, German biologist: Nobel prize 1995.
- objective danger — a danger, such as a stone fall or avalanche, to which climbing skill is irrelevant
- observation deck — an area on a high building that is surrounded with railings or fencing and which provides panoramic views
- observation ward — a ward in a hospital where patients are monitored
- 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 it own accord — If something happens of its own accord, it seems to happen by itself, without anyone making it happen.
- off-road vehicle — An off-road vehicle is a vehicle that is designed to travel over rough ground.
- 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.
- oligosaccharides — Plural form of oligosaccharide.
- on the breadline — impoverished; living at subsistence level
- one-armed bandit — slot machine (def 1).
- open-die forging — Open-die forging is a forging process in which the flow of metal is not kept completely in the die.
- operating budget — money allocated to a project
- opposed-cylinder — (of an internal-combustion engine) having cylinders on opposite sides of the crankcase in the same plane
- 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
- order of service — a prescribed form of liturgical service, or of administration of a rite or ceremony
- ordinary jubilee — the celebration of any of certain anniversaries, as the twenty-fifth (silver jubilee) fiftieth (golden jubilee) or sixtieth or seventy-fifth (diamond jubilee)
- organized labour — labour carried out by workers in trade unions, or the workers themselves
- oriental emerald — a green variety of corundum used as a gemstone
- orographic cloud — any cloud whose existence and form are largely controlled by the disturbed flow of air over and around mountains, as the banner cloud and crest cloud.
- orthodox judaism — Judaism as observed by Orthodox Jews.
- orthoformic acid — a hypothetical acid, HC(OH) 3 , known only in the form of its esters.
- osmium tetroxide — a crystalline or amorphous, colorless, poisonous compound, OsO 4 , soluble in water, alcohol, and ether: used for microscopic staining, in photography, and as a catalyst in organic synthesis.
- otherworldliness — The quality of being otherworldly.
- out of your mind — If you say that someone is out of their mind, you mean that they are mad or very foolish.
- outboard profile — an exterior side elevation of a vessel, showing all deck structures, rigging, fittings, etc.
- outside director — a director of a company who is not employed by that company but is often employed by a holding or associated company
- over-descriptive — having the quality of describing; characterized by description: a descriptive passage in an essay.
- overdramatically — In an overdramatic manner.
- overhead railway — elevated railroad.
- oxidation number — the state of an element or ion in a compound with regard to the electrons gained or lost by the element or ion in the reaction that formed the compound, expressed as a positive or negative number indicating the ionic charge of the element or ion.
- parallelepipedon — a prism with six faces, all parallelograms.
- partial ordering — a relation defined on a set, having the properties that each element is in relation to itself, the relation is transitive, and if two elements are in relation to each other, the two elements are equal.
- parts of lindsey — an area in E England constituting a former administrative division of Lincolnshire
- pays de la loire — a region of W France, on the Bay of Biscay: generally low-lying, drained by the River Loire and its tributaries; agricultural
- pearls of wisdom — good advice, wise words
- pension provider — the company or organization that makes provision for a person's pension
- percussion drill — a drill that is operated by percussion
- period furniture — furniture that was made during a particular period in time
- periodic decimal — repeating decimal.