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.
paladin palatine platina playdown platan platen platane platoon pluton peloton
paladin laden ladino gelatin gliadin gliadine kallidin celadon xylidin tolidin
palate paleate paled palladia plaid playday plead