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.
greased grassed creased graced grazed groused grossed caressed cuirassed crazed cursed cresset coursed crossed goriest cruised creosote grisette caroused crest crosshead grist corset cruset coerced crusado cruzado
creased greased dressed pressed parsed cuirassed caressed hearsed harassed versed phrased brassed braised erased arrased reused reseed reseda rased grassed raised praised reraised tressed
grease greasy crease creasy gores grass grassy grays grees greys grues egress ogres ogress