I have no idea what a "sleepy rhyme" is, but here are some words that rhyme with buck: Cluck, duck, luck, muck, puck, suck, stuck, struck, truck.
Sweepy
buck
weepy dings sleepy kings sweepy rings
One word that rhymes with "cup" and starts with "B" is "blup."
Cake! It is a common tradition to have cake on birthdays, and "cake" rhymes with "luck."
truck duck suck puck yuck buck luck tuck
Duck, muck, buck, chuck, luck, suck, yuck.
yuck, suck, luck, tuck, buck, puck, duck, f**k, etc.
Yes. The U is short, so that truck rhymes with buck and duck.
panoply, lumpy, swampy, raspy, grumpy, skimpy, sleepy, memory, agony, luxury, and all the words that end in an /i/ sound.
Luck, suck, muck, buck, chuck, cluck, duck, puck, pluck, stuck, schmuck, tuck, truck.
buck, cluck, chuck, shuck, stuck, puck, suck, tuck, firetruck