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.
boubou bubo bubu bob booboo bub boob baboo bobby booby bubba bubby baubee boobie bib
boubou bob bub bough baubee bobby boob boobie booboo booby bubba bubby bubu