noun. The act of avouching; declaration; avowal; acknowledgment.

noun. The act of avouching; positive declaration.

noun. The act of avouching.

noun. A positive declaration.

noun. a statement asserting the existence or the truth of something

"An outlandish delegate sustained against both these views, with such heat as almost carried conviction, the theory of copulation between women and the males of brutes, his authority being his own avouchment in support of fables such as that of the Minotaur which the genius of the elegant Latin poet has handed down to us in the pages of his Metamorphoses."

assertion  asseveration  averment  

affirmative  professing  profession  reaffirmation  reassertion