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.
boughless boules bowless boulles buhls bless boles bullies bolos biles bolas bolus bulls bliss bowls blues bales boils bolls bluesy belles boylas blouse blousy belies blueys bilious bullace bailies bullous bialies billies bellies ballies bailees baileys bals bels bails bells baals bills blahs balls blaze blaws balsa balas blase bawls blows