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.
closet closeout closed glost clast callosity calloused glossed coolest classed coaliest coleseed calceate callused gulosity coalesced glozed calcite glassed gluiest gallused glissade
closet loosed lost volost closed glost nailset poloist soloist teleost
close calos class classy cloys cloze colossi cols gloss glossa glossae glossy