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.
smile simile smiley samiel sawmill small smell sambal seemly smelly symbol
mile simile smile mil amole beamily bumble family mouille fumble mille amble mumble jumble ramble mule remail rumble sawmill gemmily mole doomily tumble wimble chummily gamble homily humble gamily mill maile mail email milo foamily female fimble camail gemmule nimble male ramilie roomily samiel hammily moil smiley tamale wamble chimley shamble