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.
cedars ceders seders zedoaries citers cyders ciders seaters seeders sudaries stars stairs citrus satyrs stares sitars steers steres sudors citrusy sataras setters siddurs souters citrous stereos satoris suiters sitters citreous sautoirs
gaydars chadars lidars radars cedars chuddars deodars cheddars stars bedders cheders hydros hiders attars dors deairs tars tares ladders cottars kneaders tarsi seders madras gadders padders dares taros dears beaders siddurs lauders drys dodders shedders chudders pedros widders ceders weeders waders madders udders tedders mudders chowders chadors raiders rudders odors fodders madres hydras stairs deodaras powders headers readers redears seeders mudras guitars cadres ridders codders needers aiders redders budders nodders leaders heders tahrs coders kidders midairs retears feeders tears eiders adders sataras heeders judders voiders riders bidders sudors sitars laders stares padres faders guiders nadirs tatars cyders tuataras wadders wedders wheatears biders loaders chiders ciders ottars shaders shudders