• dead ahead
• get ahead
• go ahead
• light years ahead
• streets ahead
• get up on the wrong side of the bed
• on the wrong side of the bed
• put to bed
• to bed
• best thing since sliced bread
• half a loaf is better than no bread
• white bread
• drop dead
• knock 'em dead
• stone dead
• Dead head
• acid head
• beat into one's head
• big head
• bring to a head
• eyes in the back of one's head
• fat head
• fling oneself at someone's head
• get through one's head
• go over one's head
• go to one's head
• hang one's head
• hang over one's head
• have a price on one's head
• have rocks in one's head
• heap coals of fire on one's head
• heels over head
• hide one's head
• hit the nail on the head
• in over your head
• into one's head
• keep a civil tongue in one's head
• like a bear with a sore head
• like a hole in the head
• lose one's head
• off one's head
• off the top of one's head
• over one's head
• over your head
• price on one's head
• put ideas into one's head
• rear its head
• talk out of the back of your head
• through one's head
• turn one's head
• upon one's head
• have the lead
• raise ned
• sight read
• taken as read
• in the red
• out of the red
• paint the town red
• see red
• by a thread
• hang by a thread
• fools rush in where angels fear to tread

• something nasty in the woodshed
• take someone to the woodshed

• catch one's breath
• don't hold your breath
• hold one's breath
• in the same breath
• out of breath
• save one's breath
• second breath
• short of breath
• take a long breath
• under one's breath
• under your breath
• waste one's breath
• between life and death
• bore to death
• cheat death
• do to death
• done to death
• fate worse than death
• frightened to death
• kiss of death
• matter of life and death
• meet one's death
• scare to death
• sick to death
• tickle to death
• to death

• gilt edged
• full fledged

One-syllable words do not have mosaic rhymes.