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.
whilst wiliest wellsite wooliest woolliest
whilst palest ballast lust jowliest coaliest illest palliest duellist last silliest heliast vilest roiliest realist cellist holiest lowliest lest dualist shoalest shaliest soloist phallist dialist alist chillest volost lost niellist tallest glost wiliest molest woolliest list poloist oiliest sciolist hilliest ruliest realest relist vealiest halest blest blast duelist paliest holist clast jolliest fellest bulliest gluiest diallist pollist nailset foulest wooliest mealiest ballista coolest dullest fliest shelliest violist chiliast eeliest delist fullest sliest chilliest shoaliest
whiles wails whales wholes wiles willies willows wills swills twills