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.
duellist duelist delist dualist dullest diallist dialist dulcet tallest teleost deloused dualized
niellist pollist duellist phallist cellist diallist list illest silliest fliest holist realist lowliest ballista paliest wiliest fellest chillest bulliest eeliest jowliest sciolist violist soloist alist dullest ballast shelliest woolliest shaliest roiliest heliast holiest jolliest fullest duelist mealiest ruliest coaliest relist tallest chiliast chilliest vealiest palliest hilliest oiliest dialist poloist delist dualist sliest wooliest shoaliest
duellos dellies dells duels dulls