[rock hound] {n.}, {slang} A person who studies and collects rocks […]

[rock'n'roll] or [rock and roll] {n.} A style of popular music […]

[rock-bottom] {n.} The lowest possible point. * /The nation's morale hit […]

[Roman collar] {n.} The high, plain, white collar worn by priests […]

[room and board] {n. phr.} A room for rent with meals […]

[room clerk] or [desk clerk] {n.} A person who is responsible […]

[room service] {n.} Service provided to hotel guests in their rooms. […]

[rotten egg] {n.}, {informal} A person whose character or way of […]

[rough-and-tumble] 1. {n.} Very rough, hard fighting or arguing that does […]

[roughhouse] {n.} Riotous play or commotion. * /? told the boys […]