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.
cosy cosey cos coys cozy cows coss coos goosy cozey cosie goosey cooeys cooees causey kos gos coz cues goys cuss cays goes kois goas casa caws case koas goos koss cause cozie cusso gassy gawsy goose gussy kissy
cosy goosy nosy posy rosy choosy os