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.
rets reties retuse reatas rats ruts reds rots routs rodes rates reads redos reeds roots rites rotos redes rotes redds rotas writs ratos rotis rides riots readds rodeos writes rottes raitas redias redoes riatas routes riotous rowdies roadies roadeos readies rads ritz rods rids raids ritzy roads roods rudds
beets keets whets weets duets deets sets poets pets nets meets lets leets quiets jets bets gets hets haets vets fets rets suets diets tets wets sheets