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351 Nouns That Start With RA

Part of Speech:
Word Definitions Synonyms
rabato (noun) a wired or starched collar of intricate lace; worn in 17th century Synonyms: rebato
rabbet (noun) a rectangular groove made to hold two pieces together Synonyms: rebate
rabbi (noun) spiritual leader of a Jewish congregation; qualified to expound and apply Jewish law
rabbinate (noun) the office or function of a rabbi
(noun) rabbis collectively
rabbit (noun) any of various burrowing animals of the family Leporidae having long ears and short tails; some domesticated and raised for pets or food Synonyms: coney, cony
(noun) flesh of any of various rabbits or hares (wild or domesticated) eaten as food Synonyms: hare
(noun) the fur of a rabbit Synonyms: lapin
rabbiteye (noun) shrub of southeastern United States grown commercially especially for canning industry Synonyms: rabbit-eye blueberry, rabbiteye blueberry, Vaccinium ashei
rabbitfish (noun) large European chimaera Synonyms: Chimaera monstrosa
rabbitweed (noun) low-growing sticky subshrub of southwestern United States having narrow linear leaves on many slender branches and hundreds of tiny yellow flower heads Synonyms: broom snakeroot, broom snakeweed, Gutierrezia sarothrae, rabbit-weed, snakeweed, turpentine weed
rabbitwood (noun) shrub of southeastern United States parasitic on roots of hemlocks having sparse spikes of greenish flowers and pulpy drupes Synonyms: buffalo nut, Pyrularia pubera
rabble (noun) a disorderly crowd of people Synonyms: mob, rout
(noun) disparaging terms for the common people Synonyms: ragtag, ragtag and bobtail, riffraff
rabidity (noun) unrestrained excitement or enthusiasm Synonyms: madness, rabidness
(noun) The property of being very extreme, unreasonable, or fanatical in opinion; excessively zealous; comparable to one with rabies.
rabidness (noun) unrestrained excitement or enthusiasm Synonyms: madness, rabidity
rabies (noun) an acute viral disease of the nervous system of warm-blooded animals (usually transmitted by the bite of a rabid animal); rabies is fatal if the virus reaches the brain Synonyms: hydrophobia, lyssa, madness
raccoon (noun) an omnivorous nocturnal mammal native to North America and Central America Synonyms: racoon
(noun) the fur of the North American racoon
race (noun) a canal for a current of water Synonyms: raceway
(noun) a contest of speed
(noun) any competition
(noun) people who are believed to belong to the same genetic stock
(noun) (biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species Synonyms: subspecies
(noun) the flow of air that is driven backwards by an aircraft propeller Synonyms: airstream, backwash, slipstream, wash
raceabout (noun) a small sloop having the keep of a knockabout but with finer lines and carrying more sail
racecard (noun) a program for a race meeting; lists the races and the names of the horses
racecourse (noun) a course over which races are run Synonyms: racetrack, raceway, track
racehorse (noun) a horse bred for racing Synonyms: bangtail, race horse
raceme (noun) usually elongate cluster of flowers along the main stem in which the flowers at the base open first
racer (noun) an animal that races
(noun) slender fast-moving North American snakes
(noun) a fast car that competes in races Synonyms: race car, racing car
(noun) someone who drives racing cars at high speeds Synonyms: automobile driver, race driver
racerunner (noun) very swift lizard of eastern and central United States Synonyms: Cnemidophorus sexlineatus, race runner, six-lined racerunner
racetrack (noun) a course over which races are run Synonyms: racecourse, raceway, track
raceway (noun) a canal for a current of water Synonyms: race
(noun) a course over which races are run Synonyms: racecourse, racetrack, track
rachet (noun) mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction Synonyms: ratch, ratchet
rachis (noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord Synonyms: back, backbone, spinal column, spine, vertebral column
(noun) axis of a compound leaf or compound inflorescence
rachischisis (noun) a not uncommon congenital defect in which a vertebra is malformed; unless several vertebrae are affected or there is myelomeningocele there are few symptoms; can be diagnosed by amniocentesis Synonyms: schistorrhachis, spina bifida
rachitis (noun) childhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorus Synonyms: rickets
(noun) inflammation of the vertebral column
racialism (noun) discriminatory or abusive behavior towards members of another race Synonyms: racial discrimination, racism
racialist (noun) a person with a prejudiced belief that one racial group is superior to others Synonyms: racist
raciness (noun) behavior or language bordering on indelicacy Synonyms: gaminess, ribaldry, spiciness
(noun) a strong odor or taste property Synonyms: bite, pungency, sharpness
racing (noun) the sport of engaging in contests of speed
racism (noun) discriminatory or abusive behavior towards members of another race Synonyms: racial discrimination, racialism
(noun) the prejudice that members of one race are intrinsically superior to members of other races
racist (noun) a person with a prejudiced belief that one racial group is superior to others Synonyms: racialist
rack (noun) a rapid gait of a horse in which each foot strikes the ground separately Synonyms: single-foot
(noun) a form of torture in which pain is inflicted by stretching the body
(noun) a support for displaying ot holding various articles Synonyms: stand
(noun) an instrument of torture that stretches or disjoints or mutilates victims Synonyms: wheel
(noun) the destruction or collapse of something Synonyms: wrack
(noun) rib section of a forequarter of veal or pork or especially lamb or mutton
racker (noun) an attendant who puts pool or billiard balls into a rack
racket (noun) an illegal enterprise (such as extortion or fraud or drug peddling or prostitution) carried on for profit Synonyms: fraudulent scheme, illegitimate enterprise
(noun) a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games Synonyms: racquet
(noun) the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience Synonyms: dissonance, noise
(noun) a loud and disturbing noise
racketeer (noun) someone who commits crimes for profit (especially one who obtains money by fraud or extortion)
racketeering (noun) engaging in a racket
racketiness (noun) the auditory effect characterized by loud and constant noise Synonyms: noisiness
racon (noun) a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position Synonyms: radar beacon
raconteur (noun) a person skilled in telling anecdotes Synonyms: anecdotist
racoon (noun) an omnivorous nocturnal mammal native to North America and Central America Synonyms: raccoon
racquet (noun) a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games Synonyms: racket
racquetball (noun) a game played on a handball court with short-handled rackets
(noun) the ball used in playing the game of racquetball
rad (noun) a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
(noun) the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) Synonyms: radian
radar (noun) measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects Synonyms: microwave radar, radio detection and ranging, radiolocation
raddle (noun) a red iron ore used in dyeing and marking Synonyms: reddle, ruddle
radial (noun) pneumatic tire that has radial-ply casing Synonyms: radial-ply tire, radial tire
radian (noun) the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) Synonyms: rad
radiance (noun) the quality of being bright and sending out rays of light Synonyms: effulgence, radiancy, refulgence, refulgency, shine
(noun) the amount of electromagnetic radiation leaving or arriving at a point on a surface Synonyms: glow, glowing
(noun) an attractive combination of good health and happiness
radiancy (noun) the quality of being bright and sending out rays of light Synonyms: effulgence, radiance, refulgence, refulgency, shine
radiation (noun) the act of spreading outward from a central source
(noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance Synonyms: actinotherapy, irradiation, radiation therapy, radiotherapy
(noun) a radial arrangement of nerve fibers connecting different parts of the brain
(noun) the spread of a group of organisms into new habitats
(noun) energy that is radiated or transmitted in the form of rays or waves or particles
(noun) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay Synonyms: radioactivity
(noun) syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours Synonyms: radiation sickness, radiation syndrome
radiator (noun) a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan
(noun) heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings
(noun) any object that radiates energy
radical (noun) a character conveying the lexical meaning of a logogram
(noun) (linguistics) the form of a word after all affixes are removed Synonyms: base, root, root word, stem, theme
(noun) a person who has radical ideas or opinions
(noun) (mathematics) a quantity expressed as the root of another quantity
(noun) (chemistry) two or more atoms bound together as a single unit and forming part of a molecule Synonyms: chemical group, group
(noun) an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule Synonyms: free radical
radicalism (noun) the political orientation of those who favor revolutionary change in government and society
radicchio (noun) prized variety of chicory having globose heads of red leaves
radicle (noun) (anatomy) a small structure resembling a rootlet (such as a fibril of a nerve)
radiculitis (noun) inflammation of the radicle of a nerve
radio (noun) a communication system based on broadcasting electromagnetic waves Synonyms: wireless
(noun) an electronic receiver that detects and demodulates and amplifies transmitted signals Synonyms: radio receiver, radio set, receiving set, tuner, wireless
(noun) medium for communication Synonyms: radiocommunication, wireless
radioactivity (noun) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay Synonyms: radiation
radiobiologist (noun) a biologist who studies the effects of radiation on living organisms
radiobiology (noun) the branch of biology that studies the effects of radiation on living organisms
radiocarbon (noun) a radioactive isotope of carbon Synonyms: carbon 14
radiochemist (noun) a chemist who specializes in nuclear chemistry Synonyms: nuclear chemist
radiochemistry (noun) the chemistry of radioactive substances Synonyms: nuclear chemistry
radiochlorine (noun) a radioactive isotope of chlorine
radiocommunication (noun) medium for communication Synonyms: radio, wireless
radiogram (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) Synonyms: radiograph, shadowgraph, skiagram, skiagraph
(noun) a message transmitted by wireless telegraphy
radiograph (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) Synonyms: radiogram, shadowgraph, skiagram, skiagraph
radiographer (noun) a person who makes radiographs
radiography (noun) photography that uses other kinds of radiation than visible light
(noun) the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light Synonyms: skiagraphy
radioimmunoassay (noun) immunoassay of a substance that has been radioactively labeled
radioisotope (noun) a radioactive isotope of an element; produced either naturally or artificially
radiolarian (noun) protozoa with amoeba-like bodies and radiating filamentous pseudopods
radiolocation (noun) measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects Synonyms: microwave radar, radar, radio detection and ranging
radiologist (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease Synonyms: radiotherapist
radiology (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation Synonyms: radioscopy
(noun) the branch of medical science dealing with the medical use of X-rays or other penetrating radiation
radiolysis (noun) molecular disintegration resulting from radiation
radiometer (noun) meter to detect and measure radiant energy (electromagnetic or acoustic)
radiomicrometer (noun) radiometer that is extremely sensitive
radiopacity (noun) opacity to X-rays or other radiation Synonyms: radio-opacity
radiopharmaceutical (noun) pharmaceutical consisting of a radioactive compound used in radiation therapy
radiophone (noun) a telephone that communicates by radio waves rather than along cables Synonyms: radiotelephone, wireless telephone
radiophoto (noun) a photograph transmitted by radio waves Synonyms: radiophotograph
radiophotograph (noun) a photograph transmitted by radio waves Synonyms: radiophoto
radiophotography (noun) transmission of photographs by radio waves
radioprotection (noun) protection against harmful effects of radiation
radioscopy (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation Synonyms: radiology
radiosensitivity (noun) sensitivity to the action of radiant energy Synonyms: photosensitivity
radiotelegraph (noun) the use of radio to send telegraphic messages (usually by Morse code) Synonyms: radiotelegraphy, wireless telegraph, wireless telegraphy
(noun) telegraphy that uses transmission by radio rather than by wire Synonyms: radiotelegraphy, wireless telegraphy
radiotelegraphy (noun) the use of radio to send telegraphic messages (usually by Morse code) Synonyms: radiotelegraph, wireless telegraph, wireless telegraphy
(noun) telegraphy that uses transmission by radio rather than by wire Synonyms: radiotelegraph, wireless telegraphy
radiotelephone (noun) a telephone that communicates by radio waves rather than along cables Synonyms: radiophone, wireless telephone
(noun) telephony that uses transmission by radio rather than by wire Synonyms: radiotelephony, wireless telephone
radiotelephony (noun) telephony that uses transmission by radio rather than by wire Synonyms: radiotelephone, wireless telephone
radiotherapist (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease Synonyms: radiologist
radiotherapy (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance Synonyms: actinotherapy, irradiation, radiation, radiation therapy
radiothorium (noun) radioactive isotope of thorium with mass number 228 Synonyms: thorium-228
radish (noun) pungent fleshy edible root
(noun) Eurasian plant widely cultivated for its edible pungent root usually eaten raw Synonyms: Raphanus sativus
(noun) pungent edible root of any of various cultivated radish plants
(noun) radish of Japan with a long hard durable root eaten raw or cooked Synonyms: daikon, Japanese radish, Raphanus sativus longipinnatus
(noun) a cruciferous plant of the genus Raphanus having a pungent edible root Synonyms: radish plant
radium (noun) an intensely radioactive metallic element that occurs in minute amounts in uranium ores Synonyms: atomic number 88, Ra
radius (noun) support consisting of a radial member of a wheel joining the hub to the rim Synonyms: spoke, wheel spoke
(noun) the length of a line segment between the center and circumference of a circle or sphere Synonyms: r
(noun) the outer and slightly shorter of the two bones of the human forearm
(noun) a circular region whose area is indicated by the length of its radius
(noun) a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

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