16-letter words containing r, u, n, a, o
- baron tweedsmuir — the title of Scottish novelist John Buchan
- basque provinces — an autonomous region of N Spain, comprising the provinces of Álava, Guipúzcoa, and Vizcaya: inhabited mainly by Basques, who retained virtual autonomy from the 9th to the 19th century. Pop: 1 840 700 (2003 est). Area: about 7250 sq km (2800 sq miles)
- batch production — production of goods in batches, rather than continuously
- behavioural sink — a small area in which people or animals live in overcrowded conditions
- binocular fusion — fusion (def 5a).
- binocular-fusion — the act or process of fusing; the state of being fused.
- birthday honours — (in Britain) honorary titles conferred on the official birthday of the sovereign
- blue dawn-flower — a tropical American vine, Ipomoea acuminata, of the morning glory family, having large, funnel-shaped flowers that turn from blue to pink.
- bluegrass region — a region in central Kentucky, famous for its horse farms and fields of bluegrass.
- board of inquiry — a group set up to inquire into accidents, etc
- bonded warehouse — a warehouse in which dutiable goods are deposited until duty is paid or the goods are cleared for export
- boundary dispute — dispute between neighbours about the boundary between their properties
- branchiopneustic — breathing by means of gills, as certain aquatic insect larvae.
- break new ground — to do something that has not been done before
- british honduras — Belize
- bronchopneumonia — inflammation of the lungs, originating in the bronchioles
- brown-eyed susan — a composite plant, Rudbeckia triloba, of the southeastern U.S., having a single flower with yellow rays darkening to an orange orbrown at the base and a brownish-black disk.
- buckthorn family — the plant family Rhamnaceae, characterized by shrubs and trees having alternate, simple leaves, clusters of small flowers, and fruit in the form of a drupe or capsule, and including the buckthorn, cascara, and New Jersey tea.
- bundled software — software sold as part of a package with computers or other hardware or software
- buoyancy chamber — an enclosed section of a canoe, float, ship or other object that contains air, foam, or another buoyant substance in order to help maintain buoyancy
- button snakeroot — blazing star (sense 1)
- buying behaviour — the behaviours displayed by consumers when they purchase things, such as preferences, price points, etc
- california quail — a quail, Callipepla californica, of the western coast of the U.S., having grayish-brown plumage with black, white, and chestnut markings.
- camborne-redruth — a former (until 1974) urban district in SW England, in Cornwall: formed in 1934 by the amalgamation of the neighbouring towns of Camborne and Redruth. Pop: 39 936 (2001)
- cantankerousness — disagreeable to deal with; contentious; peevish: a cantankerous, argumentative man.
- carbon bisulfide — carbon disulfide
- carbon disulfide — a heavy, volatile, colorless liquid, CS2, highly flammable and poisonous, used as a solvent, insecticide, etc.
- cardiac neurosis — an anxiety reaction characterized by quick fatigue, shortness of breath, rapid heartbeat, dizziness, and other cardiac symptoms, but not caused by disease of the heart.
- carolus linnaeus — Carolus [kar-uh-luh s] /ˈkær ə ləs/ (Show IPA), (Carl von Linné) 1707–78, Swedish botanist.
- carpatho-ukraine — a region in W Ukraine: ceded by Czechoslovakia in 1945.
- carry-on luggage — luggage that is taken inside an aircraft by hand personally by a passenger
- cedar revolution — the popular protests in 2005 that brought down the Lebanese cabinet and prompted Syria to withdraw its troops from Lebanon
- central european — involving or denoting the people, countries, cultures, or languages of Central Europe
- chalon-sur-saône — an industrial city in E central France, on the Saône River. Pop: 50 124 (1999)
- charles coughlin — Charles Edward ("Father Coughlin") 1891–1979, U.S. Roman Catholic priest, activist, radio broadcaster, and editor, born in Canada.
- cholera infantum — an often fatal form of gastroenteritis occurring in infants, not of the same cause as cholera but having somewhat similar characteristics.
- chromatic number — (mathematics) The smallest number of colours necessary to colour the nodes of a graph so that no two adjacent nodes have the same colour. See also: four colour map theorem.
- chromium plating — plating, often for decorative effect, made of chromium
- chronic glaucoma — Ophthalmology. abnormally high fluid pressure in the eye, most commonly caused either by blockage of the channel through which aqueous humor drains (open-angle glaucoma or chronic glaucoma) or by pressure of the iris against the lens, which traps the aqueous humor (angle-closure glaucoma or acute glaucoma)
- circumambulation — The act of walking around something in a circle, especially for a ritual purpose.
- circumlocutional — Of or relating to circumlocution : circumlocutionary.
- circumnavigation — to sail or fly around; make the circuit of by navigation: to circumnavigate the earth.
- circumnavigatory — Pertaining to circumnavigation.
- class background — a person's background with reference to social class
- cleaning product — a detergent or other household cleaner
- clearance volume — The clearance volume is the volume remaining above the piston of an engine when it reaches top dead center.
- cloak-and-suiter — a manufacturer or seller of clothing.
- closing argument — In a court case, a lawyer's closing argument is their final speech, in which they give a summary of their case.
- column extractor — A column extractor is a tall vessel in which one liquid removes something from another liquid using physical contact.
- combination drug — a medication comprised of set dosages of two or more separate drugs.