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