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.
boobie boob booby bob booboo babe baboo bobby baubee bawbee beebee boubou bib bub
dobie boobie doobie obe obi kebbie tibiae phobia phoebe cabbie obey lobe cobia obia oboe robe newbie yabbie
boob boobie booboo booby boo bob bobby boubou looby doobie