The initial idioms of the letter R

ribbing	ribbon
rib-tickler	rice
rice-rocket	rich
rich as Croesus	rich in
rich man's joke is always funny	rich with
richer than Croesus	riches
rickroll	rickle o' banes
ricochet off	ricockulous
rid of	ride
riddance	rid
ridden	ride (on) the wave (of something)
ride with the punches	riddin
rid out	rid up
riddle with	riddle
ridds	ride (on) the coattails of (someone)