confirming
con-firm-ing
noun
The action of making something definite or providing proof for it.
"The confirming of the results was slow."
verb
Making something definite or providing proof for its truth or existence.
"She is confirming the appointment now."
Thesaurus
Synonyms: Gram-positive, positive, validatory, collateral, validating, substantiative, verificatory, confirmative, verifying, supportive, confirmatory, corroborative
Antonyms: disconfirming, negative