1. The quality of being authentic; genuineness.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• authenticy,
• authintisity,
• aunthenticity,
• autheniticity,
• authenicity,
• authentiticy,
• authenticte,
• authentisity,
• authenticty,
• authanticity,
• authenticat,
• authenthicity,
• autentisity,
• authencitity,
• autenticity,
• authinticity,
• autheticity,
• authneticity,
• athenticity,
• authenticly

• authentically,
• authentic,
• authenticated,
• authentication,
• authenticate,
• authenticator.

The adjective form of the word "authenticity" is "authentic".

The plural of the "authenticity" can be the "authenticities".

The singular of the "authenticity" can be the "authenticity".