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.
clones colones clons colonies clowns colons clonus clines colonus callowness clans colonize colonise cullions coolness colins cleans gluons cleanness gallons callans collins cleanse colleens kaolines guylines galleons galloons gluiness glans glens kilns glueyness gleans galenas kalians kaolins galleins
leones violones colones chalones clones flanes loans gluiness hilliness bouillons aloins ballons blueness hollowness bullions villainess lanes clonus valines looneys jawlines lowness talions clons fellness beelines belons toluenes colons halons dailyness felonies billons slyness loins alienness mealiness coolness lunies cholines shallowness malines millines oiliness plainness realness sallowness galloons silliness zillions dullness talons woolliness chilliness solions mellowness galleons sullenness saloons pleons mullions lowliness wellness felines guylines jolliness juliennes cleanness fullness eloins wiliness reloans callowness millions foulness lenes relines ballonnes lines slowness alienees colonies dailiness kaolines clowns tolanes wholeness balloons wooliness boloneys paleness dulness oleines loonies felons solons clines fallowness lianes salons leanness billions glueyness planes cullions blennies loons baloneys bylines jowliness jillions illness lioness holiness lunes hellions haleness villainies alines fulness towlines colonus vileness gluons lions delaines maleness shalloons chillness gallons bowlines tallness xylenes melons soleness silanes salines pylons pillions nylons hyalines
clon clone clan cline clown colon colone coloni colony