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.
guns guans guanos guanase guanays guineas gunnies gains quins goons gowns queans quoins queens quinsy quinoas gooneys goonies gainsay goannas gayness kens cons kins cans gooeyness keens canes kines conns coons koans cains kains kinas gonzo kenos canso coins kanes kinos cones kaons conus kanas
buns fauns funs huns guns muns nouns nuns puns runs suns duns tuns uns shuns