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.
galleons gallons galloons galleins galenas glens gluons gleans callans colleens cullions glans clons glueyness cleans colons clonus clowns clones callowness colonus cleanse kaolins colones kalians collins kaolines colonies colonise gluiness guylines cleanness clans kilns clines colins glance
pleons galleons lens billions hellions lenes violones galenas pillions cleans bouillons clons lense flense lenos liens clowns eloins xylenes solions balloons galloons chalones melenas woolens talions leans loans glens saloons leones millions lenis mullens poleyns pylons reloans nylons colonus colones gleans ballons aloins baleens billons belons zillions bullions clonus aliens rellenos pollens silenus salons loins galleins loons woollens jillions gallons colleens oleins mullions mulleins melons gluons felons villeins talons cullions halons colons lions clones solons shalloons
gallein galleon galena gallon galloon