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.
book bookoo bookie bock boocoo bog bike buck biog beak beck bake back beaky bikie boggy bucko
book hook cook gook kook look nook rook sook took chook shook
boo boob boobie booboo booby bo