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.
realest realist relist ruliest realised realized released roiliest relaced
halest realest palest shoalest lest alist least illest jowliest coolest fullest oiliest mealiest molest bluest bulliest eeliest silliest dialist dullest teleost wooliest chillest shaliest roiliest celesta hilliest blest foulest vilest holiest jolliest coaliest fliest lowliest paliest realist vealiest palliest fellest ruliest celeste sliest dualist tallest wiliest woolliest chilliest shelliest shoaliest
reales rales rayless realise realize reals release relies braless earless ireless