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.
callipee calipee calliope clip clepe clypei collop gallop clap clop galop kalpa culpae kelpie
calipee callipee lipe calliope slipe lip
call calla callee callow collie scall