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.
toys tows toes toss taos toeas touse tis tas dos tuis tass tews deys teas dozy doss taws tees ties days dows dose does taus duos doozy douse dowse tasse tawse tease tizzy wytes
boys buoys foys hoys joys coys goys soys toys os