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.
poteens potteens patens pattens potence potency poutines pottiness putons patins pitons hypotenuse hypotonias patency patinas patines patness patience petunias pettiness pudency
teens sateens lateens poteens ratteens potteens tens battens lattens teensy latens tense pattens mittens ketenes dudeens rattens whitens neatens wheatens luteins tautens butenes fattens stenos catenas patens heightens retenes steins kittens quietens chutnees