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.
symbol cymol cymbal sambal small smell smile samiel simile cembali cembalo sawmill
symbol gambol mol amble mola mumble gimbal cymol rumbly ramble numbly moll amole nimble moly mool bumble timbal tombola tumble umbel wambly chimbly mole emboly fimble rumble tombolo tymbal dumbly tombal humble mumbly moil fumble sambal wimble wamble cymbal rambla gumboil nimbly jumble emboli gamble jumbal humbly shamble