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.
bib bibb bub bob babe baba bubu babu bubo boob baby bubba baboo bubby booby bobby baubee bawbee beebee boobie booboo boubou