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.
goos goosy goose gos goosey goes goys coos goas gazoo cooees cooeys kos cos gas koas coss guys cows kois gaes gays cosy coys koss cosie gassy gauss gawsy guess guise gussy kazoo cosey
boos coos goos loos moos poos zoos woos shoos os