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.
pittance potence patience pettiness pottiness pitons patency patines patness pattens potency patinize potteens poutines hypotenuse patens patins putons
laitance quittance pittance stance dance butanes phytanes voidance guidance potence radiance riddance cetanes soutanes stanes