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.
chars chares charas charrs chairs charros chores cheers chiros chorus churrs shears shares choirs chirrs chirus churros sharias chirres cheeros choreas shariahs cheerios cherries shris shoers shrews shores shires shirrs shiers sheers tiaras chorizo sherris sherries
chars ars nears bares hoarse gnarrs tares bars hears varus saros maars carse bears chares ares jars pairs hers lares lehrs boars lars wears guars airs dares knars tiaras shears mars naris wares tars dears soars roars tears parse pharos hairs chairs varas rares arse pares carrs parrs gars maras mairs ears hares hearse oars gears faros feuars fairs hoars cars vars vairs coarse fares tahrs marse gaurs knaurs wars saris nares lears lairs pars liars buhrs charas cares paras fears pears souaris mares haars fiars laris paris sears rears deairs taros wairs whirs charrs tarsi shares gnars shris years
char charro charry chary chare charr chair ochreae cherry ochre chiro sharia chore share chiru churro chirr chirre shariah chorea ochrea churr ochry