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.
sturdy sutured sturt stored stride strode stroud stared steroid stirred storied satyrid steered starred saturate stereoed start strut hysteroid strait strata strati street stretta strette stretti stretto striata striate seatrout stearate
sturdy dured tardy toured turd featured matured natured sutured detoured
star storey estray suture stroy striae strew starry stere stereo stir store stare stour story stoure stourie stoury straw strawy stray stria strow sutra astray estuary