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.
cairds cards cardias cruds creds curds cords carts credos carats crowds creeds guards carets cartes crudes carrots carates caritas corrades corrodes crits karts grids grads cruets curtsy grides greeds quarts grades kraits curets crates karats gradus quirts gratis courts gourds curites curtesy quartes creates gourdes curates croutes curtsey garotes quartos karates garrets cowrites crowdies curettes garottes garrotes corodies corridas courtesy keiretsu
birds weirds lairds girds yirds cairds shairds yairds grides sherds curds hybrids jerids wards nerds quirts braids hayrides ordos borides lords triads droids bards queridas farads purdas irides hydroids hoards grads sords jerrids beards yards myriads chorioids chards joyrides hydrides derides sarods prides oroides merdes perdus bourrides gourds nereids cords brides lards fords hairdos girts brads shreds fards urds rods raids cards nards hards pards irids hurds creds boards turds sciurids rads weirdos burds hordes guards murids hydrids airts dirts marrieds nurds gourdes bardes aroids cruds herds corridas nereides viroids toroids reds grids oreides liards sards fiords surds druids ureides words chords rides choroids shards shirts periods rids prods
caird caret scarred ecarte aigret acarid carte cart carroty carrot carried caried cared carat cardio cardiae cardia card carate acaroid aigrette scared scart