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.
culpae culpa clepe clypei calipee clap clip clop gulp calliope callipee gulpy kalpa collop kelpie
culpae salpae slype lipa lipe lope blype elope clepe kalpa culpa kelpie milpa palapa salpa slipe slope chalupa
caul coulee cull cullay cully aculei oculi scull