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.
commute comte commit comate committee commata commode comet comity gomuti combat combed comedy comade comedo gummite gamut gamete gammed gummed cameoed gummata
commute mute emeute gemmate gummite mammate roommate summate teammate mut