hallmark (n.)

• aroma
• attribute
• authentication
• badge
• banner
• bookplate
• brand
• cachet
• cast
• character
• characteristic
• check
• colophon
• configuration
• counterfoil
• cut
• device
• differentia
• differential
• docket
• earmark
• feature
• figure
• flavor
• gust
• identification
• idiosyncrasy
• image
• impress
• impression
• imprint
• index
• indicant
• indicator
• individualism
• insignia
• keynote
• label
• letterhead
• logo
• logotype
• mannerism
• mark
• marking
• masthead
• measure
• mold
• nature
• note
• odor
• particularity
• peculiarity
• picture
• plate
• property
• quality
• quirk
• representation
• representative
• savor
• seal
• shape
• sign
• signal
• signature
• signet
• singularity
• smack
• specialty
• stamp
• sticker
• stub
• symbol
• symptom
• tab
• tag
• taint
• tally
• tang
• taste
• ticket
• token
• trademark
• trait
• trick
• verification