THESAURUS
telltale sign
babbling, badge, banner, betrayal, blabbering, blabbing, character, characteristic, communication leak, dead giveaway, device, differentia, divulgation, divulgement, divulgence, divulging, earmark, evulgation, giveaway, hallmark, idiosyncrasy, image, index, indicant, indicator, indiscretion, insignia, keynote, leak, letting out, mark, measure, note, obvious clue, peculiarity, picture, property, representation, representative, seal, sigil, sign, signal, signature, stamp, sure sign, symptom, telltale, trait, unwitting disclosure
