A distinguishing quality is a characteristic that sets someone or something apart from others. It can be a TRAIT, a set of TRAITS, or a TRADEMARK. The term 'a distinguishing quality' can be broken down into three words: TRAIT (5 letters), TRAITS (6 letters), and TRADEMARK (9 letters). A TRAIT is a single quality or characteristic, while TRAITS are multiple qualities or characteristics. A TRADEMARK is a recognizable sign, design, or expression that identifies a particular product or service.