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.
canso cans cains canes cannas canoes cons kains guans kanes koans conus coins conns coons cones gains kanas kaons coneys queans conies guanos coyness goannas gayness gainsay guanase guanays guns kens kins
canso ansa anus canes hanse dans panes koans awns anes kains manus pansy bans lianas mains banes jeans vans anas wans llanos moans yeans chains wains deans sanes nanas fawns paeans tans lawns manes ruanas anis peans kanes pians lanes ranis mans guanos fanes manse banns vanes janes ains loans leans cans pans guans lianes fans beanos kaons pains sans hansa cains beans wanes means gains manas manos rains queans pianos kanas pawns fanos roans lauans yawns tains nans fauns naans sains dawns tansy weans yuans
can cain cane canna cannie canny canoe scan