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.
subareas subbureaus sabras sabres subers subrace suberous suberose suberize suberise sabers sabirs sobers zebras sobbers zebrass soberize
subareas bares barres boreas bureaus sabras sabres subbureaus