supersincerity

• a word derived from sincerity.
  sincerity

  noun

  freedom from deceit, hypocrisy, or duplicity; honesty in intention or in communicating; earnestness.

Related Words

• candor
• earnestness
• frankness
• genuineness
• goodwill
• impartiality
• probity
• reliability
• seriousness
• trustworthiness
• truth
• truthfulness
• veracity