Colby's rhymes with:
colbys, colbys, colbys, huckelby's, kilby's, shelby's, abbey's, adobe's, arby's, babies, babies', baby's, barbie's, barbies, barnaby's, bebe's, biamby's, bobby's, cabbies, camby's, colbys, cosby's, crosby's, cubbies, darby's, debbie's, dobies, entebbe's, freebies, gebbie's, grandbabies, gumbi's, hobbes, hobbies, huckelby's, kilby's, kirby's, lobbies, lobby's, ormsby's, owenby's, owensby's, rabes, rabies, robbie's, robby's, rubies, ruby's, sacirbey's, seabees, shelby's, sotheby's, sunobe's, toby's, wallabies, zombies
Colby's sounds like:
calabasas, calbos, calebs, calf's, callebs, calliopes, calpis, calves, calypso, calypsos, celebs, celibacy, chalifoux, chaloupka, chlebowski, clabaugh, clabough, claps, claybaugh, cleavage, cleaves, cliff's, cliffs, cliffs', clips, cloves, clovis, club's, clubhouse, clubhouses, clubs, colbaugh, colbeck, colbys, collapse, collapses, coolbaugh, culvahouse, cyclops, cyclops's, czechoslovak, czechoslovakia, czechoslovakia's, czechoslovaks