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.
mammock mimic
hammock hommock hummock mammock mock bemock hummocky gimmick smock moc
mambo mamma mammae mammee mammey mammie mammy