straitlaced or straightlacedadj

• rumba
• rum baba
• rumble
• rumble seat
• rumbustious
• rumen
• ruminant
• ruminate
• rummage
• rummage sale
• rummer
• rummy
• rumour
• rump
• rumple
• rumpus
• rumpus room
• rumpy-pumpy
• run
• runabout
• run across
• run after
• run along
• run amok
• run around