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.
fliest fellest foulest fullest vealiest vilest violist felsite falsity falsetto felicity filicide phallist volost fleeced flossed velocity
eeliest shelliest palliest vealiest jowliest silliest hilliest oiliest jolliest wooliest paliest woolliest chilliest shoaliest bulliest coaliest fliest holiest gluiest ruliest wiliest roiliest sliest lowliest mealiest shaliest ballista blest poloist dualist fellest illest pollist realest duellist dialist celesta relist dullest holist heliast chillest bluest niellist list shoalest coolest scilicet lest chiliast teleost molest realist vilest palest cellist sciolist fullest duelist alist foulest celeste delist soloist diallist halest tallest whilst least phallist violist
flies files fleas fleece fleecy flees flews fleys floes flues foleys folios foliose folious lifeless