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.
cards cairds cardias cords creds curds carts cruds credos crudes creeds guards crowds cartes carets carats caritas carates carrots crowdies corrades corodies corrodes grads karts crits grids corrodies curets crates gradus courts curtsy greeds grides gourds karats quarts grades cruets creates quartos garotes karates garrets curates curtsey curtesy gourdes croutes quartes curites cowrites curettes garottes garrotes corridas courtesy courteous garrottes
bards chards liards hoards nards pards fards shards beards cards guards hards boards wards lards yards sards braids reads jerrids rads myriads byroads karts irids broads birds marts marauds parades hybrids bardes cruds creds arts perdus frauds gourdes harts grids turds farts shreds fords chords gradus surds words weirdos raids treads fiords tirades dorados hydrids sciurids hurds jerids irades hearts purdas grades nerds brads hairdos girds rods burds nurds grads readds parts gourds cords breads rids sarods curds herds lairds merdes lords carts ordos reds boarts murids corrades oreads darts parados quarts farads roads rereads hordes prods charades sords cairds tarts dreads trades triads urds warts weirds charts shairds sherds yairds yirds
card cardia cardiae cardio carroty scarred credo ecarte carrot acarid cord garda carte curd cart cruddy crud carried caried caret crude cared curdy carate gardai carat acaroid caird scared cred scart