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.
volost violist vilest villosity foulest vealiest velocity fliest falsity fellest felsite flossed fullest phallist
lost volost glost duelist dullest delist diallist holist niellist sciolist relist violist vilest chillest realest pollist fullest phallist molest illest foulest coolest clast teleost fellest halest alist blast list blest cellist realist poloist palest nailset ballast last lust closet lest soloist dialist dualist duellist tallest whilst shoalest
veloce violas viols voiles voles volleys vowless ovolos