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.
crazily crassly crusily greasily grassily curiously grisly crossly grizzly coryzal gracile crissal carousal coarsely crousely grisaille carcel cresol cresyl creosol grizzle grossly
crazily racily brazil breezily frazil frizzily frowzily greasily