12-letter words containing a, g, r, o, i
- prerogatived — possessing a prerogative
- prestigiator — someone who practises sorcery or prestidigitation
- primogenital — relating to primogeniture
- prison guard — an officer in charge of prisoners in a jail
- prodigal son — a figure in a parable of Jesus (Luke 15:11–32); a wayward son who squanders his inheritance but returns home to find that his father forgives him.
- profile drag — the sum of the surface friction drag and the form drag for a body moving subsonically through a fluid
- progradation — seaward growth of a beach, delta, fan, etc., by progressive deposition of sediment by rivers or shoreline processes.
- programmatic — of, relating to, consisting of, or resembling program music.
- progymnasium — (in Europe) a school that prepares pupils for secondary education (the gymnasium)
- prolog-linda — 1. Prolog extended with Linda-style parallelism. Proc 4th Australian Conf on Artif Intell. 2. Neil MacDonald, U Edinburgh 1989. Another Prolog extended with Linda, implemented on a Computing Surface.
- prolongation — the act of prolonging: the prolongation of a line.
- promulgation — to make known by open declaration; publish; proclaim formally or put into operation (a law, decree of a court, etc.).
- proofreading — correction of text
- propagandism — the art, system, or use of propaganda
- propagandist — a person involved in producing or spreading propaganda.
- propagandize — to propagate or publicize (principles, dogma, etc.) by means of propaganda.
- propugnation — defence
- pyramidology — a belief system based on the supposed occult significance of the Egyptian pyramids
- pyromagnetic — (formerly) thermomagnetic (def 1).
- quiz program — a radio or television program in which contestants compete, often for prizes, by answering questions.
- race norming — the process of statistically adjusting the scores of minority job applicants on job-qualification tests by rating each test-taker's score against the results of others in his or her racial or ethnic group.
- racing homer — a kind of homing pigeon used for racing
- radio galaxy — a galaxy that emits much more strongly in the radio part of the spectrum than does a typical galaxy.
- radiobiology — the branch of biology dealing with the effects of radiation on living matter.
- radioecology — the branch of ecology concerned with the effects of radioactivity on the environment
- radiographer — X-ray technician
- radiological — of or relating to radiology.
- ragged robin — a plant, Lychnis flos-cuculi, of the pink family, having pink or white flowers with dissected petals.
- rainbow flag — a multicoloured flag used as a symbol of peace; often used to represent gay and lesbian pride
- ranging pole — a pole for marking positions in surveying
- reading book — a book for people who are learning to read, to help them become accustomed to looking at and understanding written words
- reading room — a room set aside for reading, as in a library or club.
- reaping hook — a curved cutting tool with a sharp edge, used in the cutting or harvesting of crops
- recategorize — to arrange in categories or classes; classify.
- recognizable — to identify as something or someone previously seen, known, etc.: He had changed so much that one could scarcely recognize him.
- recognizance — Law. a bond or obligation of record entered into before a court of record or a magistrate, binding a person to do a particular act. the sum pledged as surety on such a bond.
- red goatfish — a goatfish, Mullus auratus.
- redelegation — a group or body of delegates: Our club sent a delegation to the rally.
- reformatting — the shape and size of a book as determined by the number of times the original sheet has been folded to form the leaves. Compare duodecimo, folio (def 2), octavo, quarto.
- refrigerator — a box, room, or cabinet in which food, drink, etc., are kept cool by means of ice or mechanical refrigeration.
- regeneration — act of regenerating; state of being regenerated.
- registration — the act of registering.
- regulation t — (in the U.S.) a federal law governing the amount of credit that may be advanced by brokers and dealers to customers for the purchase of securities on margin.
- regulation u — (in the U.S.) a federal law governing the amount of credit that may be advanced by a bank for the purchase of listed securities.
- reinvigorate — to give vigor to; fill with life and energy; energize.
- relitigation — the act or process of litigating: a matter that is still in litigation.
- renegotiable — to negotiate again, as a loan, treaty, etc.
- renegotiated — to negotiate again, as a loan, treaty, etc.
- repagination — Bibliography. the number of pages or leaves of a book, manuscript, etc., identified in bibliographical description or cataloging.
- reregulation — renewed regulation, the act or process of regulating again