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.
butt butty butte but bute batt bott bitt bout battu beaut bitty betta buteo batty bought beauty battue bud bot bat bet bit batteau bota bate boat beta beat beet boot bite bedu baud baht bait byte bawty biota boite booty buddy