12-letter words containing a, r, c, f, o
- out of reach — beyond arm's length
- overclassify — to classify to excess
- oxford comma — a comma between the final items in a list, often preceding the word 'and' or 'or', such as the final comma in the list newspapers, magazines, and books
- pacific rose — a large variety of eating apple from New Zealand, with sweet flesh
- pasch flower — pasqueflower
- pectoral fin — (in fishes) either of a pair of fins usually situated behind the head, one on each side, and corresponding to the forelimbs of higher vertebrates.
- pelecaniform — of, or having the nature of, an order (Pelecaniformes) of swimming birds having all four toes connected in a webbed foot, including pelicans and cormorants
- perfectation — the action or process of becoming or causing to become perfect or complete
- petrifaction — the act or process of petrifying; the state of being petrified.
- placentiform — shaped like a placenta, with a flat rounded form
- platform car — a railroad freight car having no enclosing sides or top; a flatcar.
- pontificator — the office or term of office of a pontiff.
- port of call — a port visited briefly by a ship, usually to take on or discharge passengers and cargo or to undergo repairs.
- postfracture — taking place after a fracture
- power factor — (in an electrical circuit) the ratio of the power dissipated to the product of the input volts times amps
- prefectorial — of, relating to, or characteristic of a prefect: prefectorial powers.
- prime factor — any number in the set of prime numbers that is also a factor of a given integer
- prolifically — producing offspring, young, fruit, etc., abundantly; highly fruitful: a prolific pear tree.
- purification — to make pure; free from anything that debases, pollutes, adulterates, or contaminates: to purify metals.
- putrefaction — the act or process of putrefying; the anaerobic decomposition of organic matter by bacteria and fungi that results in obnoxiously odorous products; rotting.
- qualificator — (in an ecclesiastical court) an officer charged with examining cases and preparing them for trial.
- rachmaninoff — Sergei Wassilievitch [sur-gey vuh-seel-yuh-vich;; Russian syir-gyey vuh-syee-lyi-vyich] /sɜrˈgeɪ vəˈsil yə vɪtʃ;; Russian syɪrˈgyeɪ vʌˈsyi lyɪ vyɪtʃ/ (Show IPA), 1873–1943, Russian pianist and composer.
- ramification — the act or process of ramifying.
- ratification — the act of ratifying; confirmation; sanction.
- reflectogram — an image of an under-drawing or image taken from beneath the surface of paint in a work of art
- richard korf — (person) A Professor of computer science at the University of California, Los Angeles. Richard Korf received his B.S. from MIT in 1977, and his M.S. and Ph.D. in computer science from Carnegie-Mellon University in 1980 and 1983. From 1983 to 1985 he served as Herbert M. Singer Assistant Professor of Computer Science at Columbia University. Dr. Korf studies problem-solving, heuristic search and planning in artificial intelligence. He wrote "Learning to Solve Problems by Searching for Macro-Operators" (Pitman, 1985). He serves on the editorial boards of Artificial Intelligence, and the Journal of Applied Intelligence. Dr. Korf is the recipient of several awards and is a Fellow of the American Association for Artificial Intelligence.
- road surface — the surface of the road, often asphalt
- road traffic — traffic on the road
- roman a clef — a novel that represents historical events and characters under the guise of fiction.
- roof terrace — a garden on the roof of a building
- rotator cuff — a bandlike structure encircling and supporting the shoulder joint, formed by four muscles attached to and merging with the joint capsule.
- rotflmaoastc — (chat) Rolling on the floor laughing my ass (or arse) off and scaring the cat. The superlative form of ROTFL.
- saffron rice — a dish made from white rice and flavoured with the spice saffron
- saronic gulf — an inlet of the Aegean, on the SE coast of Greece, between Attica and the Peloponnesus. 50 miles (80 km) long; 30 miles (48 km) wide.
- satisfactory — giving or affording satisfaction; fulfilling all demands or requirements: a satisfactory solution.
- scarificator — a person who scarifies.
- scratchproof — resistant to scratches.
- significator — a planet deemed significant in astrology
- silk factory — plant where silk fabric is produced
- soft chancre — chancroid.
- soprano clef — a sign locating middle C on the bottom line of the staff.
- sorbefacient — inducing absorption
- south africa — Republic of, a country in S Africa; member of the Commonwealth of Nations until 1961. 472,000 sq. mi. (1,222,480 sq. km). Capitals: Pretoria and Cape Town.
- stalactiform — resembling or shaped like a stalactite.
- subfactorial — the number of ways a group of objects can be arranged so that none of the objects are in their original or correct place
- surface road — a road or street level with its surroundings: surface roads and elevated highways.
- synchroflash — of or relating to photography employing a device that synchronizes the photoflash with the shutter.
- take care of — a state of mind in which one is troubled; worry, anxiety, or concern: He was never free from care.
- testificator — a person who witnesses
- torrefaction — to subject to fire or intense heat; parch, roast, or scorch.