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