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.
clonus colonus clons colons clowns clones colones clans cullions colonies colonise cleans gluons clines colins callowness cleanse callans collins gallons colleens colonize coolness galloons galleons kilns glans glens cleanness gleans galenas kalians kaolins galleins gluiness guylines kaolines
clonus colonus loons loins loans villainous halons jillions aloins clons clowns colons ballons gallons cullions gluons melons mullions pillions pylons salons selenious silenus solons talions chalones colones balloons lions leones billions billons bouillons bullions eloins felonious belons felons violones hellions clones galleons galloons melanous millions nylons pleons reloans saloons selenous solions zillions talons shalloons
clon clone clan cline clown colon colone coloni colony