avowance

noun2

1. •
   (no longer used) An act of avowing; an avowal.
2. •
   (no longer used) An upholding; a defence, a vindication.

   • Reader I request thee do Me, thy Self, and Truth right: VVhether can my avovvance of King-murdering be collected from any thing here vvritten by me? — 1659