13-letter words containing a, n, g, o
- racing pigeon — a pigeon bred and trained for the sport of pigeon racing
- radiation fog — fog produced by the nocturnal cooling of the surface boundary layer to a temperature at which its content of water vapor condenses.
- raking course — a concealed course of bricks laid diagonally to the wall surface in a raking bond.
- rambling rose — any of various cultivated hybrid roses that straggle over other vegetation
- re-forwarding — toward or at a place, point, or time in advance; onward; ahead: to move forward; from this day forward; to look forward.
- re-regulation — a law, rule, or other order prescribed by authority, especially to regulate conduct.
- reading group — a group of people who meet regularly to discuss a book that they have all read
- reaggregation — the act or process of reaggregrating something
- reassignation — an appointment for a meeting, especially a lover's secret rendezvous.
- reciprocating — to give, feel, etc., in return.
- recognitional — an act of recognizing or the state of being recognized.
- recording van — a van containing sound and image recording equipment, used as a mobile recording studio
- redesignation — an act of designating.
- refrigeration — the act or process of refrigerating.
- regimentation — the act of regimenting or the state of being regimented.
- regiomontanus — Friedrich Max [free-drik maks;; German free-drikh mahks] /ˈfri drɪk mæks;; German ˈfri drɪx mɑks/ (Show IPA), 1823–1900, English Sanskrit scholar and philologist born in Germany.
- regionalistic — Government. the principle or system of dividing a city, state, etc., into separate administrative regions.
- regulator pin — either of two pins on the regulators of certain timepieces, one on each side of the hairspring, that can be moved to adjust the rate of the timepiece.
- regurgitation — the act of regurgitating.
- reintegration — restoration to a unified state.
- reinterrogate — to interrogate or question again
- reinvigorated — to give vigor to; fill with life and energy; energize.
- reinvigorator — something that gives new life and energy (to something)
- resegregation — the act or practice of segregating; a setting apart or separation of people or things from others or from the main body or group: gender segregation in some fundamentalist religions.
- ring-a-lievio — a game played usually between two teams in which the members of one team attempt to find, capture, and imprison the members of the other, who can be freed only by a teammate not yet captured.
- rising action — a related series of incidents in a literary plot that build toward the point of greatest interest.
- road-blocking — an obstruction placed across a road, especially of barricades or police cars, for halting or hindering traffic, as to facilitate the capture of a pursued car or inspection for safety violations.
- roasting jack — a rotating spit for roasting meat on
- robot dancing — a dance of the 1980s characterized by jerky mechanical movements
- rock painting — a painting done on rock, usually by early people
- rocking chair — a chair mounted on rockers or springs so as to permit a person to rock back and forth while sitting.
- rocking shear — a shear having a curved blade that cuts with a rocking motion.
- rocking valve — (on a steam engine) a valve mechanism oscillating through an arc to open and close.
- roentgenogram — a photograph made with x-rays.
- rogation days — Usually, rogations. Ecclesiastical. solemn supplication, especially as chanted during procession on the three days (Rogation Days) before Ascension Day.
- rollerblading — skating on rollerblades
- rolling paper — cigarette paper available in small packages to smokers for rolling their own cigarettes.
- romanticising — to make romantic; invest with a romantic character: Many people romanticize the role of an editor.
- rose geranium — a geranium, Pelargonium graveolens, cultivated for its fragrant, lobed or narrowly divided leaves.
- rotary engine — an engine, as a turbine, in which the impelling fluid produces torque directly rather than by acting upon reciprocating parts.
- rote learning — memorization by repetition
- rough diamond — gemstone: uncut diamond
- ruggedization — the act or process of making something rugged
- running board — a small ledge, step, or footboard, formerly beneath the doors of an automobile, to assist passengers entering or leaving the car.
- running total — a running total is a total which changes because numbers keep being added to it as something progresses
- saint gregory — Saint (Hildebrand) c1020–85, Italian ecclesiastic: pope 1073–85.
- salpingectomy — excision of the Fallopian tube.
- salpingostomy — the formation of an artificial opening into a Fallopian tube.
- santo domingo — a republic in the West Indies, occupying the E part of the island of Hispaniola. 19,129 sq. mi. (49,545 sq. km). Capital: Santo Domingo.
- saurognathous — related to or resembling the Saurognathae family of birds that possess palate bones similar to those in saurians or lizards