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.
clepe clypei calipee clap clip clop calliope callipee culpa kelep collop culpae glop gulp kelp
clepe elope shlep lipe lope beleap bleep blype leap kelep julep pileup salep sleep slipe slope slype shlepp