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.
calliope callipee calipee collop gallop clip clop clepe galop clypei clap glop kalpa culpae gloppy kelpie
calliope lipe lope loupe elope calipee callipee slipe slope lip lop
call calla callee callow collie scall