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.
platen platan platane platina platoon palatine polytene polyteny pluton paladin peloton playdown
platen laten laden lateen latten leaden litten lutein flatten gelatin gluten molten platan polytene polyteny
plat plate plateau platy palate pelt plaid plait playday plead pleat plot plotty plutei splat