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.
celesta celeste cellist sliest sciolist silliest soloist
celesta lest foulest fullest vealiest vilest halest hilliest fliest holiest jolliest molest lowliest palest fellest silliest dullest teleost wooliest chillest shaliest shoalest coaliest palliest least ruliest bluest blest ballista illest jowliest coolest bulliest mealiest oiliest realest paliest eeliest roiliest celeste sliest tallest wiliest woolliest chilliest shelliest shoaliest