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.
guanase guanays guans guanos guns goannas guineas kanas gains queans cannas kinase gunnies quinoas gayness gainsay cans kanes kains koans canes kaons goons kinas canso cains gowns quins canoes queens quince quinsy quoins gooneys goonies
guanase anas unease sansei rennase manse manias lianas lanais kinase kanas guanays goannas cannas vinasse hanse faunas faenas ansae anoas annas anise lanose manas mannas nanas ruanas saunas hyaenas
guanay guan guano iguana gan gun