I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
bubba bubby bub bibb bubo bubu bobby baubee boubou bib bob baba babe babu baby boob
bubba nubia tubby tubae tuba subah suba rubby nubby abba knubby cubby jubbah juba hubby bubby chubby
bubby bubba bub baubee bibb bobby boubou bubo bubu hubby jubbah cubby nubby rubby tubby