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