Synonyms of hallmark

1 Syllable
stamp, mark, sign, seal
2 Syllables
badge, stickers, emblems, earmark, emblem, label, labels, signet, stamping
3 Syllables
trademark, earmarking, feature, device
4 Syllables
endorsement, indication
5 Syllables
certification, ratification
6 Syllables
characterization, characterizations