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.
koans kanas kanes kains kaons koines kins kens goannas cons cans kines coons kenos gowns kanzu cones kinas cains conus kinos coins conns canso keens gains canes guans goons canoes guanos coneys conies cannas kinase queans quoins coyness gooneys guanays gainsay gayness goonies guanase quinoas keenness guns gooeyness
koans loans roans moans ons aeons cons hones lianes lawns nouns nanas kanes kains lanes ansa phons loons fans gowns pans bonus vans nonas fohns monas knowns mans goons llanos mains onus nones monos peones dans genoas jones beanos sains quinoas pions guanos coins banns zones downs tans pians tauons ranis pones toons tons wains hyponoias wans hysons wons yawns yonis sons deans panes poons ruanas conus scions sanes naans peans boons loins dons bans paeons peons onos coons pansy neons ions manes kanas lianas anas manse awns eons phonos anis cans cones paeans foins hanse means lions ones fanes conns hons moons fauns leans beans manos manus canso guans anoas bones kaons gains joins vanes manas janes ains fanos noons fawns cains fons leones canes pawns muons lauans anus phones banes sonsy cions hansa queans pains mons pianos jeans johns owns nans quoins donsy dawns donas anes sones zoons tains tansy pons tones rains tonus towns wanes weans sans chains yeans yuans
koan goanna kain kana kane kaon koine ikon kokanee