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.
roommates roomettes remates remotes ramets remits ramadas reemits remeets remudas remedies reembodies
roommates gemmates summates teammates mates mateys mattes hamates humates comates commutes gummites mammatus remates tomatoes mats