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