r, R rabbi rabbit rabies raccoon race¹ race² racer racetrack racial rack racket¹ racket² racquetball radar radiant radiant energy radiate radiation radiator radical radii radio radioactive radioactivity radish radium radius radon raft rag rage ragged ragweed raid rail railing railroad railway rain rainbow raincoat raindrop rainfall rain forest rainy raise raisin rake rally ram RAM ramble ramp ramrod ran ranch random rang range ranger rank¹ rank² ransom rap rapid rapture rare¹ rare² rarely rascal rash¹ rash² rasp raspberry rat rate rather ratify ratio ration rational rattle rattlesnake rave ravel raven ravine raw rawhide raw material ray¹ ray² rayon razor Rd. R.D. re- reach react reaction reactor read readable reader readily reading ready real real estate realistic reality realization realize really realm reap reappear rear¹ rear² rearrange reason reasonable reasoning reassure rebel rebellion recall recapture recede receipt receive receiver recent receptacle reception recess recession recipe recital recite reckless reckon recline recognition recognize recollect recollection recommend recommendation record recorder recording recover re-cover recovery recreation recruit rectangle recuperate recur recycle red red blood cell redcoat Red Cross red-handed reduce reduction redwood reed reef reel¹ reel² reel³ reelect reentry refer referee reference reference book refill refine refinery reflect reflection reflector reforest reform reformatory refrain refresh refreshment refrigerate refrigerator refuge refugee refund refuse¹ refuse² regain regard regarding regardless regime regiment region register registered nurse regret regretful regular regulate regulation rehearsal rehearse reign rein reindeer reinforce reject rejoice relapse relate related relation relationship relative relax relaxation relay relay race release relent relevant reliable relic relief¹ relief² relief map relieve religion religious relish reluctant rely remain remainder remains remark remarkable remedy remember remind remission remodel remote remote control removal remove render rendezvous renew renovate renowned rent repaid repair repay repeal repeat repel repetition replace reply report report card reporter represent representative reproduce reproduction reptile republic republican Republican Party reputation request require requirement reread rescue research resemblance resemble resent resentment reservation reserve reservoir reside residence resident residential resign resignation resin resist resistance resolution resolve resonant resort resound resource respect respectable respectful respective respectively respiration respiratory respond response responsibility responsible rest¹ rest² restaurant restless restore restrain restrict restriction restroom result resume resuscitate retail retain retarded retina retire retirement retiring retreat retrieve retriever retrorocket return reunion reveal revenge revenue reverence reverent reverse review revise revival revive revoke revolt revolution revolutionary Revolutionary War revolve revolver reward reword RFD or R.F.D. rheumatic fever rheumatism rhinoceros Rhode Island rhododendron rhombus rhubarb rhyme rhythm rhythmic or rhythmical RI R.I. rib ribbon rice rich riches rickety rid ridden riddle¹ riddle² ride rider ridge ridicule ridiculous rifle rig rigging right right angle right-hand right-handed right triangle rigid rim rind ring¹ ring² rink rinse riot rip ripe ripen ripple rise risen risk ritual rival river rivet roach road road map roadrunner roadside roam roar roast rob robber robbery robe robin robot robust rock¹ rock² rocker rocket rocking chair rocking horse rock ’n’ roll rocky¹ rocky² rod rode rodent rodeo roe¹ roe² rogue role roll roller roller coaster roller-skate roller skate rolling pin ROM Roman Roman Catholic Roman Catholic Church romance Romance language Romania Roman numeral romantic Rome romp roof rook¹ rook² rookie room roommate roomy roost rooster root¹ root² root³ rope rose¹ rose² rosebud Rosh Hashanah rosy rot rotary rotate rotation rotor rotten rouge rough round roundabout roundhouse round number round trip roundup rouse rout¹ rout² route routine row¹ row² row³ rowboat royal royalty R.R. Rte. rub rubber rubber band rubber stamp rubbish rubble ruble ruby rudder ruddy rude ruff ruffle rug rugged ruin rule ruler rum Rumania rumble rummage rumor rump run runaway run-down rung¹ rung² runner runner-up running running mate runway rupture rural rush¹ rush² Russia Russian rust rustic rustle rusty rut ruthless rye