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.
tass tasse tas tassie taos toss taus taws teas tease tawse toeas tussah dassie tissue tusseh tis tissuey dais tews tuis toes daws tees toys dahs tows doss diss days ties tace daisy tazza tazze touse wytes
ass bass quass lass mass pass sass tass as