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.
churrs churros chirrs charrs chirres charros chars cherries choirs chores chiros cheers chirus chairs shirrs charas chorus chares cheeros choreas sherris cheerios sherries shris sheers shears shires shiers shares shoers shrews shores chorizo sharias shariahs
burrs durrs currs murrs churrs purrs burs houris buhrs sierras orris purse ours furs suers myrrhs morros bursa sours gnarrs errs murres knurs knaurs feuars sieurs lures bourse course yirrs sherris churros chirres charros urus tours terras burse kurus ruers mures duras nurse dorrs duros surras kauris pours parrs buras sirras guars purs dures cirrus hours tarres burros cures aures carrs kouros durras gharris fours gaurs euros birrs auras pursy lours arras morris lauras gurus derris suras douras auris curs puris arris barres curse muras chirrs torrs ursa queuers whirrs charrs murras giaours shirrs yours
churro churr ochreae ochre chorea chore chiru chirre chirr chiro cherry chary charry charro charr chare char ochrea ochry