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.
blast blasty ballast blastie blest bluest ballista bulliest ballistae blazed belaced blessed blissed bloused blowsed
last clast ballast blast whilst niellist duelist fellest volost delist cellist realist heliast molest chillest diallist pollist foulest blest coolest holist phallist illest dullest duellist fullest lust tallest glost dualist lost vilest sciolist relist realest dialist blasty chiliast list palest nailset halest alist violist least lest shoalest
blase balas bals balsa belays bels blahs blaws blaze bless bliss bolas bylaws ablaze