matchbook: a small folder of paper safety matches
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
antisocial personality disorder: a personality disorder characterized by amorality and lack of affect; capable of violent acts without guilt feelings (`psychopathic personality' was once widely used but was superseded by `sociopathic personality' to indicate the social aspects of the disorder, but now `antisocial personality disorder' is the preferred term)