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.
wheatens whitens whatness whiteness wetness weediness widens witans wideness woodenness
latens wheatens neatens patens tens luteins kittens pattens quietens potteens ratteens lattens mittens retenes ladens satins stenos deadens lateens battens catenas ratans teens heightens tautens zeatins steins sateens batons rattens tense leadens butenes poteens ketenes patins matins fattens whitens