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.
strut start sturt seatrout strati street strait stroud strata stretto strette striate stretta striata stretti stearate saturate stride stored strode sturdy stared steroid stirred storied satyrid starred citrate steered sutured stereoed hysteroid
strut tart tort tret trot trout attrit outtrot retort seatrout start sturt whittret
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