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.
drowsier drossier drosera dressier dorser hydrosere dresser tarsier trouser tressier trusser tracer
frowsier drowsier tarsier dressier frowzier drossier pursier brasier brassier brassiere browser prosier rosier creasier crosier cuirassier gorsier grassier greasier prissier horsier tressier
drowse drowsy draws dross drossy duros trows