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.
toss toes toys tass taos tows doss touse toeas tasse tassie tusseh tissue tussah tis tas dos tissuey duos ties tuis dows tees taws dose teas diss does taus tews douse dowse tawse tease wytes
boss foss joss coss koss loss moss doss toss os