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.
pattens patens potteens patins patency patinas patines patness poteens patience pettiness pottiness pitons putons hypotenuse potence potency patinize pittance poutines pudency
fattens rattens pattens kittens lattens battens mittens tens buttons stenos retenes ratteens lattins rattans rattons ketenes butenes steins sateens catenas wheatens luteins tautens quietens potteens jettons cottons latens poteens heightens teens neatens muttons mattins lateens tense patens whitens