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.
monetize monetise mantis mounts mondes montes mentees minuets monades mantissa manatees monodies mints manats mantas mantes monads mondos mounds
monetize sonnetize quantize monetise nineties hypnotize sanitize scientize unitize
moaned monde monied monte mooned mount