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.
decrees degrees decares decries decrease decuries decors dekares deckers decorous degrease daycares doggeries dikers diggers dockers dackers dickers daggers digress daikers doggers duckers duikers toggeries takers tokers tackers taggers tickers tigress tuckers tuggers
screes decrees chickarees decries daycares cures decares sucres scries acres scares pugrees creese cress crews cries cores secures cares agrees fiacres lucres nacres pugarees puggarees puggrees cicorees scores screws grees degrees shikarees
decree decare decker decor decry decury degree