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.
tsadi tsade tacit testa tawsed teased testae tossed toused tissued dissuade test tost
sadi tsadi sad sade said sati visaed misadd missaid naysaid passade passado pesade posada resaid tsade
sades sadis saids tads toadies toads shades shadows shads