• have one's fling
• fit for a king
• mood ring
• throw your hat in the ring
• toss one's hat in the ring
• have one's ass in a sling
• full of the joys of spring
• first string
• how long is a piece of string
• latch string
• on a string
• full swing
• in full swing
• in the swing
• a little knowledge is a dangerous thing
• do one's own thing
• for one thing
• not the thing
• quite the thing
• sure thing
• the in thing

• got a thing going
• hard going
• know whether one is coming or going
• not to know whether one is coming or going
• whether one is coming or going

• left hand doesn't know what the right hand is doing
• let one's left hand know what one's right hand is doing
• nothing doing
• what's doing

• it ain't over till the fat lady sings
• apron strings
• cling to one's mother's apron strings
• hang on to one's mother's apron strings
• let go of one's mother's apron strings
• pull strings
• purse strings
• tied to one's mother's apron strings
• see things
• clip one's wings
• sprout wings
• try one's wings
• waiting in the wings

• on the blink
• nurse a drink
• soft drink
• you can lead a horse to water, but you can't make it drink
• missing link
• in the pink
• tickle pink
• tickled pink
• skating rink
• everything but the kitchen sink
• heart sink
• kitchen sink
• big stink
• raise a stink
• little does one think
• shudder to think
• nod's as good as a wink
• sleep a wink

One-syllable words do not have mosaic rhymes.