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