noun
1.
Synonyms: indication 3, evidence, index, indicia, mark, sign, significant, symptom
Related Word: harbinger, omen, portent; characteristic, earmark; indicator, smack
2.
Synonyms: remembrance 3, keepsake, memento, memorial, relic, remembrancer, reminder, souvenir, trophy
3.
Synonyms: expression 3, gesture, indication, reminder, sign
4.
Synonyms: pledge 1, earnest, pawn, security, warrant