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.
besetter baster bestir bister buster bestrow boaster booster bustier bistro bestrew bistoury
setter resetter besetter wester diester wrester seater sitter ester fester jester gazetteer keester nester pester rester kiester zester quester tester masseter yester
beset best beast beastie besot bestow