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.
committed commuted combatted commutate combated commodity coembodied
emitted committed omitted reemitted remitted demitted matted vomited imitate limited smutted summited
commit committee comity commata commute