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.
rewets reweds
wets rewets tweets swots sweets sweats swats reweds pewits peewits wots wits whets wheats weets weds wats twats twits
rewed rewet rowed brewed crewed