rabbit, rabble, rabid racetrack, racial/cism, rack, racket, racketeer, radar, radial, radiance, radiant radiate, radiation, radiator, radical, radio, radish, radium, radius/radii, radon raft, rag, rage, ragged

raid, railway, rainbow, raise, raisin, rake, rake, rally, ram, ramp, rampant, rampart ramshackle, ranch, rancid, rancor, random, range, rankle, ransack, ransom, rant rap, rapacious, rapacity, rape, rapid, rapt, rapture, rarity, rascal, rash, rasp raspberry, rat, ratchet, ratify, ratio, ration, rational/lize, ratan, rattle,~snake ravage, rave, raven, ravenous, ravine, ravish, raw, ray, rayon, raze

react, reactor, readjust, realign, realm, ream, reap, rear, rebel, rebound, rebuff rebuke , recall, recant, recapitulate, recapture, recast, recede, receipt, receptacle reception, receptive, recess, recession, recipe, recipient, reciprocal, recite reck, reckon, reclaim, recline, recluse, recognize, recoil, recomment, recompense reconcile, reconnaissance, reconnoitre, reconstruct, recount, recoup, recouse,recreant recreation, recruit, rectangle, rectify, rectilinear, rectitude,rector, recumbent recuperate, recur

redeem, redemption, rediffusion, redress, reduce, redundance, redundant, reduplicate reed, reef, reek, reel, reelect refectory, refer, referee, reference, referendum refill, refine, refit, reflect, reflex, reform, refract, refrain, refrigerate, refuge refugee, refund, refuse, refute regale, regarding, regency, regenerate, regent, regime, regiment, region, register regret, regular, regulate

rehabilitate, rehearsal/se reign, reimburse, rein, reinforce, reinstate, reiterate, reject, rejoice, rejoin rejuvenate, relapse, relate, relax, relay, release, relent, relevant, reliable, relic relief, relieve, religion, religious, relinquish, relish, reluctant, rely remain, remains, remark, rememdy, remind, reminiscent, remiss/mission, remit/mittance remnant, remonstrate, remorse, remote, remould, remunerate

renaissance, rend, rendezvous, renegade, renew , renounce, renovate, renown rent/tal, renunciation

repair, reparation, repartee, repast, repatriate, repay, repeal, repel, repellent repent/tant, repercussion, repertoire, repertory, repetition, repine, replenish replete, replica, repose, represent, repress, reprieve, reprimand, reprisal, reproach reproof, reprove, reptile, repudiate, repugnance/nant, repulse, repulsive, repute request, require, requisite, requite

research, resemblance/ble, resnet, reserve, reserved, reservoir, reside, residual residue, resign, resin, resist, resolute, resolve/ved, resonance/nant, resort resound, resource, respect, respecting, respective, respiration, respirator,respite resplendent,respond/nse/nsive, responsibility/ble ,restaurant, restitution, restore restrain, restrict, resume, resumption, resurgence, resurrection

retail, retain, retainer, retaliate, retard, retell, reticence/nt, retinue, retire retort, retouch, retrace, retract, retreat, retrench, retrieve retro-, retrograde/gression, retrospect reunion, reunite

reveal, reveille, revel, revelation, revelry, revenge, revenue, reverberate, revere reverence/end/ent, reverie, reverse, revert, revile, revise, revival, revive, revoke revolt, revolution, revolve/ver, revue, revulsion reward

rhapsody, rheostat, rhetoric, rheumatism, rhinoceros, rhomb, rhubarb, rhyme, rhythm/mic rib, ribbon, rick, rickets/ty, rid/ddance, riddle, ridge, ridicule/lous, rife, rifle rift,rig, rigging, rigid, rigmarole, rigorous/gor, rill, rim, rind, ringleader, rink rinse, riot/tous, rip, ripe, ripple, risk, rite, ritual, rival, rivalry, rivet, rivulet RNA=ribonucleic acid

roadster, roam, roar, roast, rob, robber/bery, robe, robin, robot, robust, rock, rocker rockery, rocket/try, rod, rodent, roe, rogue/guish, roll, roll-call, romance, romp rook, roost, rooster, rope, rosary, rostrum, rot, rotary/tate, rote, rotten, rouble rouge, rough, roughshod, rouse, rout, route, routine, rove, rowdy, royal

rub, rubber, rubbish, rubble, Rubiks, ruby, rucksack, rudder, ruddy, rude, rudiment/tary rue, ruffian, ruffle, rug, rugby, rugged, ruin, rum, rumble, ruminate, rummage, rumor rump, rumple, rung, runner-up, runthrough, rupture, rural, ruse, rush, russet, rust rustic, rustle, rustproof, rut, ruthless rye