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.
kos koss koas kois kas kousso cos kis gos goos goys cows coys kues goes cosy kiss kays coss kaas kaes goas keys coos keas kissy kazoo cosey cosie goose goosy kusso cooees cooeys goosey