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.
guineas guns guanase quinoas gunnies guanays guans quins kinas kines gains quince queans quoins koines kinase guanos quinsy goonies goannas gayness gooneys gainsay kins goons gooeyness canes kains coins gowns kanes kinos cains kanas cones cannas canoes coneys conies queens coyness
guineas tineas kinas seines pinnas pinas nines lines kinase minas quinoas lianes koines bines kines tonneaus uneasy wines chaines chines lianas hygienes heinies hyponeas tines dienes sinews dines zines cines vines sines pines mines meinies fines vinas unease whines winoes chinas shines ins