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.
heliast holist holiest helicity hilliest halest
heliast chiliast list last woolliest wiliest diallist sciolist sliest fliest oiliest ruliest relist poloist holist jowliest duelist palliest violist hilliest mealiest vealiest coaliest phallist chilliest shelliest delist cellist eeliest clast holiest lowliest roiliest realist pollist paliest niellist ballast least blast bulliest jolliest ballista silliest soloist dialist dualist duellist wooliest alist blasty shaliest shoaliest