repeat repetition replace reply report reporter represent representative republic request require rescue research resemble reserve reservoir residence resist resistance resolution resolve resource respect respective respond respond to response responsibility responsible rest restaurant restless restore restrict result result from result in resume retain retire return reveal reverse review revise revolution revolutionary reward ribbon rice rich rid riddle ride rifle right right now ring ripe rise risk river road roar rob rock rocket rod role roll roller roof room root rose rough round route routine royal rub rubber rubbish rude ruin rule ruler run rural rush rabbit race radar radio rag rail railroad rain raincoat rainy raise range rank rapid rare rarely rat rate rather ratio raw ray reach react reaction read reader reading ready real reality realize really rear reason reasonable recall receipt receive receiver recent recently reception recognize recommend record recorder recover recovery red reduce reduction refer reference reflect reflection right away reform refrigerator refuse regard regarding regardless regardless of region register regret regular reject relate relation relationship relative relax release reliable relief religion rely rely on remain remark remarkable remember remind remote remove renew rent repair