The initial idioms of the letter C

coup de grâce	courage
courage of (one's) convictions	courage of one's convictions, have the
courier	course of action
course of nature	course of true love never did run smooth
course of true love never ran smoothly, the	course through
course	court
courtesy	cousin
cove	covenant of salt
send to Coventry	cover a lot of ground
cover a multitude of sins	cover against
cover ass	cover back
cover (one's) bases	cover (one's) feet
cover for	cover girl
cover in	cover one's ass
cover your ass with paper	cover one's tracks