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.
butyls butles buttals botels betels budless boatels buddles bottles beetles battles beatless bootless battalias buddleias bedels beadles bedells bedless boodles bodiless bootlace
butyls tels battles mottles petals odyles pottles metals mettles kittles rootles ratels settles cuttles styles ketols idylls dottels cuittles tattles tils tittles atlas totals vittles whittles beetles chattels betels boatels botels sotols fettles motels odyls nettles pettles littles metols kettles rattles ratals rotls cutlas guttles bottles hotels stylus idyls dottles phytols titles footles tootles vitals wattles buttals wittols butles shuttles