A distinguishing feature is a characteristic that sets something apart from other similar things. HALLMARK, TRADEMARK, CACHET, TRAIT, and SCAR are all words that can be used to describe a distinguishing feature. HALLMARK is an 8 letter word meaning a mark or sign that is distinctive of a particular person, organization, or product. TRADEMARK is a 9 letter word meaning a distinctive mark or sign used to identify a product or manufacturer. CACHET is a 6 letter word meaning a quality that makes someone or something special or attractive. TRAIT is a 5 letter word meaning a distinguishing quality or characteristic. Finally, SCAR is a 4 letter word meaning a mark left on the skin or within body tissue after a wound or injury has healed.