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.
coset cosset cost coast costa costae cosied coesite caseate cast casette cassette cased caste goosed keyset gusset casita cussed cuesta cozied caused cassata gaseity gooiest gast gust kist
roset coset set sett miseat misset seta host joist coast asset basset joust cosset gusset nosed most costa oust posed posset reseat roast roost loosed hosta russet disseat dosed tasset tost knesset bassett lost cost russety doest beset roust suet goosed boost foist ghost ghosty hoist boast hosed toast dost seat keyset misseat moist moste noosed oast peseta posit post reset roosed rosed wost
cosey cos case cooees cooeys coos cosie coss cosy cows coys cozey cogs cokes