| redevelop | (verb) change the plans for the use of (land) | - |
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| (verb) formulate or develop again, of an improved theory or hypothesis | Synonyms: reformulate |
| (verb) develop for a second time, in order to improve the contrast, colour, etc., of a negative or print | - |
| redevelopment | (noun) the act of improving by renewing and restoring | Synonyms: overhaul, renovation |
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| redeye | (noun) a night flight from which the passengers emerge with eyes red from lack of sleep | Synonyms: redeye flight |
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| redfish | (noun) male salmon that has recently spawned | - |
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| (noun) large edible fish found off coast of United States from Massachusetts to Mexico | Synonyms: channel bass, red drum, Sciaenops ocellatus |
| (noun) North Atlantic rockfish | Synonyms: ocean perch, rosefish |
| redhead | (noun) black-and-white North American woodpecker having a red head and neck | Synonyms: Melanerpes erythrocephalus, redheaded woodpecker |
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| (noun) North American diving duck with a grey-and-black body and reddish-brown head | Synonyms: Aythya americana |
| (noun) someone who has red hair | Synonyms: carrottop, red-header, redheader |
| redheaded | (adjective) having red hair and usually fair skin | - |
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| redheader | (noun) someone who has red hair | Synonyms: carrottop, red-header, redhead |
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| redhorse | (noun) North American sucker with reddish fins | Synonyms: redhorse sucker |
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| redirect | (verb) channel into a new direction | Synonyms: airt |
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| rediscover | (verb) discover again | - |
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| rediscovery | (noun) the act of discovering again | - |
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| redispose | (verb) dispose anew | - |
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| redisposition | (noun) the withdrawal and redistribution of forces in an attempt to use them more effectively | Synonyms: redeployment |
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| redistribute | (verb) distribute anew | - |
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| redistributed | (adjective) having population and industries relocated from urban to outlying areas | - |
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| redistribution | (noun) distributing again | - |
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| redline | (verb) discriminate in selling or renting housing in certain areas of a neighborhood | - |
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| redly | (adverb) displaying a red color | - |
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| redmaids | (noun) succulent carpet-forming plant having small brilliant reddish-pink flowers; southwestern United States | Synonyms: Calandrinia ciliata, red maids |
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| redneck | (noun) a poor White person in the southern United States | Synonyms: cracker |
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| redness | (noun) red color or pigment; the chromatic color resembling the hue of blood | Synonyms: red |
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| (noun) a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat | Synonyms: inflammation, rubor |
| redo | (verb) do over, as of (part of) a house | Synonyms: reconstruct, remodel |
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| (verb) make new | Synonyms: make over, refashion, remake |
| redolence | (noun) a pleasingly sweet olfactory property | Synonyms: bouquet, fragrance, fragrancy, sweetness |
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| redolent | (adjective) having a strong pleasant odor | Synonyms: aromatic |
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| (adjective) serving to bring to mind | Synonyms: evocative, remindful, reminiscent, resonant |
| (adjective) (used with `of' or `with') noticeably odorous | Synonyms: smelling |
| redouble | (verb) double in magnitude, extent, or intensity | - |
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| (verb) make twice as great or intense | - |
| (verb) double again | - |
| redoubled | (adjective) become much greater in intensity or size or amount | - |
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| redoubt | (noun) an entrenched stronghold or refuge | - |
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| (noun) (military) a temporary or supplementary fortification; typically square or polygonal without flanking defenses | - |
| redoubtable | (adjective) inspiring fear | Synonyms: formidable, unnerving |
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| (adjective) worthy of respect or honor | - |
| redound | (verb) contribute | - |
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| (verb) have an effect for good or ill | - |
| (verb) return or recoil | - |
| redox | (noun) a reversible chemical reaction in which one reaction is an oxidation and the reverse is a reduction | Synonyms: oxidation-reduction, oxidoreduction |
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| redpoll | (noun) small siskin-like finch with a red crown and a rosy breast and rump | Synonyms: Carduelis flammea |
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| (noun) small siskin-like finch with a red crown | Synonyms: Carduelis hornemanni |
| redraft | (noun) a draft for the amount of a dishonored draft plus the costs and charges of drafting again | - |
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| redress | (noun) act of correcting an error or a fault or an evil | Synonyms: remediation, remedy |
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| (noun) a sum of money paid in compensation for loss or injury | Synonyms: amends, damages, indemnification, indemnity, restitution |
| (verb) make reparations or amends for | Synonyms: compensate, correct, right |
| redroot | (noun) perennial woodland native of North America having a red root and red sap and bearing a solitary lobed leaf and white flower in early spring and having acrid emetic properties; rootstock used as a stimulant and expectorant | Synonyms: bloodroot, puccoon, Sanguinaria canadensis, tetterwort |
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| redshank | (noun) a common Old World wading bird with long red legs | Synonyms: Tringa totanus |
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| redshift | (noun) (astronomy) a shift in the spectra of very distant galaxies toward longer wavelengths (toward the red end of the spectrum); generally interpreted as evidence that the universe is expanding | Synonyms: red shift |
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| redstart | (noun) European songbird with a reddish breast and tail; related to Old World robins | Synonyms: redtail |
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| (noun) flycatching warbler of eastern North America the male having bright orange on sides and wings and tail | Synonyms: American redstart, Setophaga ruticilla |
| redtail | (noun) dark brown American hawk species having a reddish-brown tail | Synonyms: Buteo jamaicensis, red-tailed hawk |
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| (noun) European songbird with a reddish breast and tail; related to Old World robins | Synonyms: redstart |
| reduce | (verb) take off weight | Synonyms: melt off, slenderize, slim, slim down, thin |
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| (verb) cut down on; make a reduction in | Synonyms: bring down, cut, cut back, cut down, trim, trim back, trim down |
| (verb) narrow or limit | Synonyms: tighten |
| (verb) cook until very little liquid is left | Synonyms: boil down, concentrate |
| (verb) to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons | Synonyms: deoxidise, deoxidize |
| (verb) make smaller | Synonyms: scale down |
| (verb) reduce in size; reduce physically | Synonyms: shrink |
| (verb) make less complex | - |
| (verb) reduce in scope while retaining essential elements | Synonyms: abbreviate, abridge, contract, cut, foreshorten, shorten |
| (verb) lessen the strength or flavor of a solution or mixture | Synonyms: cut, dilute, thin, thin out |
| (verb) be cooked until very little liquid is left | Synonyms: boil down, concentrate, decoct |
| (verb) be the essential element | Synonyms: boil down, come down |
| (verb) destress and thus weaken a sound when pronouncing it | - |
| (verb) undergo meiosis | - |
| (verb) reposition (a broken bone after surgery) back to its normal site | - |
| (verb) lower in grade or rank or force somebody into an undignified situation | - |
| (verb) lessen and make more modest | - |
| (verb) simplify the form of a mathematical equation of expression by substituting one term for another | - |
| (verb) bring to humbler or weaker state or condition | - |
| (verb) put down by force or intimidation | Synonyms: keep down, quash, repress, subdue, subjugate |
| reduced | (adjective) made less in size or amount or degree | Synonyms: decreased |
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| (adjective) well below normal (especially in price) | Synonyms: rock-bottom |
| reducer | (noun) pipefitting that joins two pipes of different diameter | - |
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| (noun) a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver | Synonyms: reducing agent, reductant |
| reducible | (adjective) capable of being reduced | - |
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| reducing | (noun) any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent | Synonyms: reduction |
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| (noun) loss of excess weight (as by dieting); becoming slimmer | - |
| reductant | (noun) a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver | Synonyms: reducer, reducing agent |
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| reductase | (noun) an enzyme that catalyses the biochemical reduction of some specified substance | - |
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| reductio | (noun) (reduction to the absurd) a disproof by showing that the consequences of the proposition are absurd; or a proof of a proposition by showing that its negation leads to a contradiction | Synonyms: reductio ad absurdum |
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| reduction | (noun) the act of decreasing or reducing something | Synonyms: decrease, diminution, step-down |
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| (noun) the act of reducing complexity | Synonyms: simplification |
| (noun) any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent | Synonyms: reducing |
| reductionism | (noun) a theory that all complex systems can be completely understood in terms of their components | - |
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| (noun) the analysis of complex things into simpler constituents | - |
| reductionist | (adjective) of or relating to the theory of reductionism | - |
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| reductive | (adjective) characterized by or causing diminution or curtailment | - |
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| reductivism | (noun) an art movement in sculpture and painting that began in the 1950s and emphasized extreme simplification of form and color | Synonyms: minimal art, minimalism |
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| redundance | (noun) the attribute of being superfluous and unneeded | Synonyms: redundancy |
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| redundancy | (noun) repetition of an act needlessly | - |
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| (noun) the attribute of being superfluous and unneeded | Synonyms: redundance |
| (noun) (electronics) a system design that duplicates components to provide alternatives in case one component fails | - |
| (noun) repetition of messages to reduce the probability of errors in transmission | - |
| redundant | (adjective) more than is needed, desired, or required | Synonyms: excess, extra, spare, supererogatory, superfluous, supernumerary, surplus |
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| (adjective) repetition of same and identical sense with different and non-identical words | Synonyms: pleonastic, tautologic, tautological |
| reduplicate | (verb) make or do or perform again | Synonyms: double, duplicate, repeat, replicate |
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| (verb) form by reduplication | Synonyms: geminate |
| reduplication | (noun) the act of repeating over and again (or an instance thereof) | Synonyms: reiteration |
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| (noun) a word formed by or containing a repeated syllable or speech sound (usually at the beginning of the word) | - |
| (noun) the syllable added in a reduplicated word form | - |
| (noun) repetition of the final words of a sentence or line at the beginning of the next | Synonyms: anadiplosis |
| reduviid | (noun) a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals | Synonyms: assassin bug |
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| redux | (adjective) brought back | - |
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| redwing | (noun) small European thrush having reddish flanks | Synonyms: Turdus iliacus |
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| (noun) North American blackbird with scarlet patches on the wings | Synonyms: Agelaius phoeniceus, red-winged blackbird |
| redwood | (noun) the soft reddish wood of either of two species of sequoia trees | - |
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| (noun) either of two huge coniferous California trees that reach a height of 300 feet; sometimes placed in the Taxodiaceae | Synonyms: sequoia |
| (noun) wood of either of two huge coniferous California trees that reach a height of 300 feet; sometimes placed in the Taxodiaceae | Synonyms: sequoia |
| reecho | (verb) repeat back like an echo | - |
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| (verb) repeat or return an echo again or repeatedly; send (an echo) back | - |
| (verb) echo repeatedly, echo again and again | - |
| reechoing | (adjective) (of sounds) repeating by reflection | Synonyms: echoing |
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| reed | (noun) a musical instrument that sounds by means of a vibrating reed | Synonyms: beating-reed instrument, reed instrument |
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| (noun) a vibrator consisting of a thin strip of stiff material that vibrates to produce a tone when air streams over it | Synonyms: vibrating reed |
| (noun) tall woody perennial grasses with hollow slender stems especially of the genera Arundo and Phragmites | - |
| reedbird | (noun) migratory American songbird | Synonyms: bobolink, Dolichonyx oryzivorus, ricebird |
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| (noun) small European warbler that breeds among reeds and wedges and winters in Africa | Synonyms: Acrocephalus schoenobaenus, sedge bird, sedge warbler, sedge wren |
| reedlike | (adjective) resembling a reed in being upright and slender | Synonyms: reedy |
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| reedmace | (noun) tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa | Synonyms: bullrush, bulrush, cat's-tail, nailrod, reed mace, Typha latifolia |
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| reedy | (adjective) having a tone of a reed instrument | Synonyms: wheezy |
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| (adjective) resembling a reed in being upright and slender | Synonyms: reedlike |
| reef | (noun) one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind | - |
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| (noun) a submerged ridge of rock or coral near the surface of the water | - |
| (verb) roll up (a portion of a sail) in order to reduce its area | - |
| (verb) reduce (a sail) by taking in a reef | - |
| (verb) lower and bring partially inboard | - |
| reefer | (noun) marijuana leaves rolled into a cigarette for smoking | Synonyms: joint, marijuana cigarette, spliff, stick |
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| reefy | (adjective) full of submerged reefs or sandbanks or shoals | Synonyms: shelfy, shelvy, shoaly |
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| reek | (noun) a distinctive odor that is offensively unpleasant | Synonyms: fetor, foetor, malodor, malodour, mephitis, stench, stink |
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| (verb) be wet with sweat or blood, as of one's face | Synonyms: fume |
| (verb) smell badly and offensively | Synonyms: stink |
| (verb) have an element suggestive (of something) | Synonyms: smack, smell |
| (verb) give off smoke, fumes, warm vapour, steam, etc. | - |
| reeking | (adjective) giving off a strong unpleasant smell | - |
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| (adjective) wet with secreted or exuded moisture such as sweat or tears | Synonyms: watery |
| reel | (noun) a lively dance of Scottish Highlanders; marked by circular moves and gliding steps | Synonyms: Scottish reel |
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| (noun) an American country dance which starts with the couples facing each other in two lines | Synonyms: Virginia reel |
| (noun) a winder around which thread or tape or film or other flexible materials can be wound | Synonyms: bobbin, spool |
| (noun) winder consisting of a revolving spool with a handle; attached to a fishing rod | - |
| (noun) a roll of photographic film holding a series of frames to be projected by a movie projector | - |
| (noun) music composed for dancing a reel | - |
| (verb) wind onto or off a reel | - |
| (verb) walk as if unable to control one's movements | Synonyms: careen, keel, lurch, stagger, swag |
| (verb) revolve quickly and repeatedly around one's own axis | Synonyms: gyrate, spin, spin around, whirl |
| reelect | (verb) elect again | Synonyms: return |
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| reelection | (noun) election again | - |
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| reeler | (noun) a dancer of reels | - |
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| (noun) someone who walks unsteadily as if about to fall | Synonyms: staggerer, totterer |
| reenact | (verb) act out; represent or perform as if in a play | Synonyms: act out, enact |
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| (verb) enact or perform again | - |
| (verb) enact again | - |
| reenactment | (noun) performing a role in an event that occurred at an earlier time | - |
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| reenactor | (noun) a person who enacts a role in an event that occurred earlier | - |
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| reenforce | (verb) make stronger | Synonyms: reinforce |
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| reenforcement | (noun) a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission | Synonyms: reinforcement, support |
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| (noun) information that makes more forcible or convincing | Synonyms: reinforcement |
| reenlistment | (noun) a renewed enlistment | - |
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| reentrant | (adjective) (of angles) pointing inward | Synonyms: re-entrant |
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| reentry | (noun) the act of entering again | - |
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| reestablish | (verb) bring back into original existence, use, function, or position | Synonyms: reinstate, restore |
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| reevaluate | (verb) revise or renew one's assessment | Synonyms: reassess |
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| reevaluation | (noun) the evaluation of something a second time (or more) | - |
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| reeve | (noun) female ruff | - |
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| (verb) fasten by passing through a hole or around something | - |
| (verb) pass through a hole or opening | - |
| (verb) pass a rope through | - |
| reexamination | (noun) a subsequent examination of a patient for the purpose of monitoring earlier treatment | Synonyms: follow-up, followup, review |
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| (noun) (law) questioning of a witness by the party that called the witness after that witness has been subject to cross-examination | Synonyms: redirect examination |
| reexamine | (verb) look at again; examine again | Synonyms: review |
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| ref | (noun) (sports) the chief official (as in boxing or American football) who is expected to ensure fair play | Synonyms: referee |
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| refabrication | (noun) assembling again | Synonyms: reassembly |
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| reface | (verb) put a new facing on (a garment) | - |
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| (verb) provide with a new facing | - |
| refashion | (verb) make new | Synonyms: make over, redo, remake |
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| refection | (noun) a light meal or repast | - |
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| refectory | (noun) a communal dining-hall (usually in a monastery) | - |
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| refer | (verb) think of, regard, or classify under a subsuming principle or with a general group or in relation to another | - |
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| (verb) have as a meaning | Synonyms: denote |
| (verb) make reference to | Synonyms: advert, bring up, cite, mention, name |
| (verb) use a name to designate | - |
| (verb) seek information from | Synonyms: consult, look up |
| (verb) send or direct for treatment, information, or a decision | - |
| (verb) be relevant to | Synonyms: bear on, come to, concern, have to do with, pertain, relate, touch, touch on |
| referable | (adjective) capable of being assigned or credited to | Synonyms: ascribable, due, imputable |
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| referee | (noun) (sports) the chief official (as in boxing or American football) who is expected to ensure fair play | Synonyms: ref |
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| (noun) someone who reads manuscripts and judges their suitability for publication | Synonyms: reader, reviewer |
| (noun) an attorney appointed by a court to investigate and report on a case | - |
| (verb) evaluate professionally a colleague's work | Synonyms: peer review |
| (verb) be a referee or umpire in a sports competition | Synonyms: umpire |
| refereeing | (noun) the act of umpiring | Synonyms: officiating, officiation, umpirage |
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