The initial idioms of the letter R

rear back	rear end
rear its head	rear its ugly head
rear up	rear-end
rear-ender	rearrange (the) deckchairs on the Titanic
rearrange	reason
reason against	reason out
reason with	reasonable
reassign to	reassure
reassure about	reassure of
rebel	rebel against
rebel at	rebound
rebound from	rebuke for
recall	recall from
recall to	recall to mind
recast in	recede from