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.
guans guanos guns guanase guanays gains queans cans gainsay gayness gunnies guineas goannas kaons canso goons cains kanas kains koans canes quins gowns kanes queens quinsy canoes cannas quoins gooneys goonies quinoas cons kens kins gooeyness
lauans guans yuans uns huns anis canso fanos manus hansa ains guns nuns kaons canes anus ansa mains pianos faunas awns queans vanes tunes jeans kanas fans moans fawns anes mans quins manes deans yeans shuns sunns weans wanes lanes fauns runes tans duns ruanas rains llanos dans pawns sains guanos nans tauons pans naans pains roans lunas punas lianas lawns sans wains beans fanes munis buns hanse funs koans janes manse lianes banes cains yawns chains bans cans kanes vans leans muons manas means muns bunns bunas paeans wans manos nouns sanes pians peans loans puns lunes rouens panes nanas banns pansy kains gains anas suns ranis dawns dunes ruins tains tansy runs tunas tuns saunas beanos
guan guanay guano gan gun gaen gain gane gaun goanna guinea gunny iguana