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.
goannas cannas guanays guanase koans gains kanas gowns goons conns guans guanos gunnies gooneys gayness goonies gainsay guineas cans cons guns canes coins cones kaons gonzo coons gooeyness conus kains kanes kinas canso cains canoes coneys conies kinase koines queans quoins coyness quinoas
cannas mannas annas goannas anas lianas guanays sunnahs nanas sennas lanais manas guanase pinnas kanas ruanas duennas zinnias manias joannes nonas pannes faenas rennase banns saunas anoas siennas faunas sunnas hennas donnas hyaenas