characteristic, feature - a prominent aspect of something; "the map showed roads and other features"; "generosity is one of his best characteristics"

calling card - a distinguishing characteristic or behavior; "bombs are a terrorist's calling cards"

individualism, individuality, individuation - the quality of being individual; "so absorbed by the movement that she lost all sense of individuality"

foible, idiosyncrasy, mannerism - a behavioral attribute that is distinctive and peculiar to an individual

object, physical object - a tangible and visible entity; an entity that can cast a shadow; "it was full of rackets, balls and other objects"

bric-a-brac, knickknackery, nicknack, whatnot, knickknack - miscellaneous curios

collectable, collectible - things considered to be worth collecting (not necessarily valuable or antique)

collector's item, piece de resistance, showpiece - the outstanding item (the prize piece or main exhibit) in a collection