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.
frowsier frowzier frouzier frizer friseur frizzer furzier foreseer frizzier farcer forcer farceur fiercer freezer
frowsier drowsier tarsier dressier frowzier drossier pursier brasier brassier brassiere browser prosier rosier creasier crosier cuirassier gorsier grassier greasier prissier horsier tressier
frows frowsy faros froes frowzy vrows