race radar radio rain raise rally random range rape rapid rapidly rare rarely rate rather ratio reach reaction reader ready real reality realize really rear reason reasonable rebel recall receive recent recently recession recognition recognize recommend record recorded recording recover recovery reduce reduction reference referendum referred referring reflect reform regardless regime region regional register regular regularly regulation regulatory relationship relative relatively relatives release relevant reliable relief relies religious reload rely relying remain remember remote remotely remove repair repeatedly replace replacement report reportedly reporter represent reputation request requested require requirement rescue research researcher researchers resident residential resistance resolution resolve resort resource respect respond response responsible rest restaurant restore result resume retail retailer retailers retain retirement return reveal revenue reverse review reviewed revolution rich ride right rights ring rise risk rival river road robot robotic robust rock rocket role roll rollout room roughly round route router rover rule ruled ruling rural rush