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