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.
boat bot bat bout beat batt bait bott bate bota boot baht beaut booty biota battu bawty batty boite bawtie beauty bootie battue bought bootee bateau bit but bod bad bet batteau bute bite butt bade bitt baud body bawd beta byte bead bode beet baaed butte buteo betta booed boody bitty beady bawdy butty baddy
boat coat goat moat oat doat shoat at