| Scrabble Word | Definition |
| radioactive17 | Exhibiting radioactivity. |
| rainbowlike20 | Resembling a rainbow; displaying a range of colours. |
| ratatouille11 | A traditional French Provençal stewed vegetable dish consisting primarily of tomatoes, zucchini and eggplant, with other ingredients. |
| ratiocinate13 | To use the powers of the mind logically and methodically; to reason. |
| rationalise11 | (British spelling) alternative spelling of rationalize |
| rationalize20 | To make something rational or more rational. |
| rattlesnake15 | Any of various venomous American snakes, of genera Crotalus and Sistrurus, having a rattle at the end of its tail. |
| reaggregate14 | To aggregate again. |
| reassurance13 | The feeling of being reassured, of having confidence restored, of having apprehensions dispelled. |
| reattribute13 | To change the attribution of; to give credit to someone else for a deed. |
| Scrabble Word | Definition |
| racecourse14 | A course over which races are run. |
| radarscope15 | An oscilloscope used as the viewing screen of a radar system. |
| radicalise13 | Alternative spelling of radicalize |
| radicalize22 | (transitive) To make radical. |
| radiopaque22 | impenetrable to X-rays and other radiation |
| radiophone16 | A photophone. |
| radiosonde12 | A miniature radio carried aloft by an unmanned balloon to automatically transmit measurements of the upper air such as the wind speed, pressure, temperature, and relative humidity to a receiving station on the ground. |
| ramshackle21 | In disrepair or disorder; poorly maintained; lacking upkeep, usually of buildings or vehicles. |
| rawinsonde14 | A radiosonde whose position is tracked as it ascends to give wind speed and direction information. |
| reactivate15 | To activate again. |
| Scrabble Word | Definition |
| rabbinate13 | The office or function of a rabbi. |
| racehorse14 | A horse that competes in races. |
| rachillae14 | plural of rachilla |
| racialize20 | To categorize or treat in racial terms. |
| radiative13 | (physics) of, relating to, or occurring through radiation |
| raffinate15 | (chemistry) A solution from which some material has been removed by extraction with an immiscible liquid |
| raffinose15 | (biochemistry) A trisaccharide, composed of galactose, glucose and fructose, that is widely distributed in many plants |
| raiseable11 | Alternative form of raisable |
| ranchlike18 | Resembling a ranch or some aspect of one. |
| randomize21 | US and Oxford British English standard spelling of randomise. |
| Scrabble Word | Definition |
| racemate12 | (chemistry) a racemic mixture |
| racemize21 | (chemistry, transitive) To convert (an enantiomer) into a racemic mixture. |
| racemose12 | (botany) Having flowers arranged along a single central axis, as in a raceme, spike, or catkin. |
| raclette10 | A dish, of Swiss origin, similar to a fondue, consisting of melted cheese traditionally served on boiled potatoes and accompanied with pickles. |
| radiable11 | Transparent to radiant energy, especially X-rays. Capable of being penetrated and examined by rays or waves. |
| radiance11 | The quality of being radiant, shining, bright or splendid. |
| radicate11 | (transitive, rare) To cause to take root; to plant or establish firmly. |
| radwaste12 | radioactive waste |
| raisable10 | Capable of being raised. |
| raisonne8 | first-person singular present indicative of raisonner |
| Scrabble Word | Definition |
| radiale8 | The carpal bone in the tetrapod forelimb that corresponds to the scaphoid bone in humans |
| radiate8 | To extend, send or spread out from a center like radii. |
| radicle10 | (botany) The rudimentary shoot of a plant which supports the cotyledons in the seed, and from which the root is developed downward; the root of the embryo. |
| radulae8 | plural of radula |
| ragtime10 | (music, uncountable) A musical form having a rhythm characterized by strong syncopation in the melody with a regularly accented accompaniment. |
| ralline7 | (ornithology, rare) Of, or pertaining to members of the Rallidae family (also referred to as rails). |
| ramilie9 | |
| rampage12 | A course of violent, frenzied action. |
| rampike15 | (dated, regional) A standing dead tree. |
| rampole11 | |
| Scrabble Word | Definition |
| rabble10 | (intransitive) To speak in a confused manner; talk incoherently; utter nonsense |
| raceme10 | (botany) An indeterminate inflorescence in which the flowers are arranged along a single central axis. |
| rackle12 | (countable, Britain dialectal, Northern England, Scotland) A chain. |
| raddle8 | A red ochre. |
| radome9 | A radar dome. |
| raffle12 | A drawing, often held as a fundraiser, in which tickets or chances are sold to win a prize. |
| raggee8 | Alternative form of ragi |
| raggle8 | (construction) A groove or slot, often cut in a masonry wall or other vertical surface, for inserting an inset flashing component such as a reglet. |
| rallye9 | (motor racing) Dated form of rally. |
| ramate8 | second-person plural present indicative of ramare |
| Scrabble Word | Definition |
| ragee6 | |
| raise5 | (physical) To cause to rise; to lift or elevate. |
| rakee9 | Alternative form of raki |
| ramee7 | Alternative form of ramie |
| ramie7 | (usually countable) A tall, tropical Asian perennial herb, Boehmeria nivea, cultivated for its fibrous stems. |
| rance7 | A type of coloured marble from Belgium. Rance is red and often has white or blue graining. |
| ranee5 | Alternative spelling of rani |
| range6 | A line or series of mountains, buildings, etc. |
| raphe10 | (anatomy) A seamlike ridge or furrow on an organ, bodily tissue, or other structure, typically marking the line where two halves or sections fused in the embryo. |
| rathe8 | (poetic) Ripening or blooming early. |
| Scrabble Word | Definition |
| race6 | A contest between people, animals, vehicles, etc. where the goal is to be the first to reach some objective. Example: Several horses run in a horse race, and the first one to reach the finishing post wins |
| rage5 | Violent uncontrolled anger. |
| rake8 | (agriculture, horticulture) A garden tool with a row of pointed teeth fixed to a long handle, used for collecting debris, grass, etc., for flattening the ground, or for loosening soil; also, a similar wheel-mounted tool drawn by a horse or a tractor. |
| rale4 | (medicine, now chiefly in plural) An abnormal clicking, rattling or crackling sound, made by one or both lungs and heard with a stethoscope, caused by the popping open of airways collapsed by fluid or exudate, or sometimes by pulmonary edema. |
| rape6 | (now rare) The taking of something by force; seizure, plunder. [from early 14th c.] |
| rare4 | Very uncommon; scarce. |
| rase4 | (Can we add an example for this sense?) |
| rate4 | (obsolete) The worth of something; value. [15th-19th centuries] |
| rave7 | An enthusiastic review (such as of a play). |
| raze13 | (transitive) To demolish; to level to the ground. |