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.
gaurs gars gurus guars kauris guiros cars kauries curs gurries carrs grows kurus curse grays gorsy carse greys grass cures cares currs goers gores grees gross grues gorse coarse curies grouse curios grease queers caress kouros caries karoos greasy quires course kaross grassy carouse carries carious queuers curries curiosa curious queries karroos quaeres carassow quarries curassow cors cris crus kirs kors kris
knaurs gaurs ars hares marse burs fours kurus nurse hearse euros vairs auris fares ares cures mairs arse gars curs pears knurs aures liars vars kauris lairs hoarse cares furs purse hours fiars boars lauras coarse paris bares praus guars mares douras durrs sours wares urus deairs tares purrs tears wears charas charrs uraeus churrs shears years tars sears naris auras dures ours laris pars roars rares lures mures soars cars suras gnarrs knars saris paras haars burse giaours burrs buhrs tahrs dares carrs duras saros ursa purs hears souaris rears parrs fairs pours nears shares tarsi kouros carse hairs bears pairs lares mars gears course feuars pursy lours lars maars maras varas airs wars jars bursa bureaus ears hoars faros houris pharos bars gurus chares buras queuers curse varus bourse muras fears currs murrs tiaras sieurs chars chairs taros duros dears suers ruers puris lears tours parse pares oars nares gnars wairs yours
gaur gar guar guiro gurry guru kauri kaury agar