rise rising risk risk-averse risk-taking risky rite ritual ritualistic rival riven river riverbank riverside rivet riviera rivulet rna road road-test roadblock roadholding roadkill roadshow roadside roadster roadway roadworks roadworthiness roadworthy roam roar roast roaster rob robber robbery robe robot robotics robust robustly robustness rock rockabilly rocket rocky rococo rod roe rogue role roll roller Rollerblade™ rolling rollover roly-poly ROM roman romance Romani romantic romanticism romcom romp rompers rondo roof rook rookie room room-mate roommate root rope ropy rosacea rosary rose rose-coloured roseate rosebud rosy rot rotary rotate rotation rotor rotten rotund rotundity rouge rough roughly roulette round round-eyed round-shouldered round-the-clock