Open English Wordnet
Nouns
(n)confirmation, verification, check, substantiationadditional proof that something that was believed (some fact or hypothesis or theory) is correct“fossils provided further confirmation of the evolutionary theory”
(n)ratification, confirmationmaking something valid by formally ratifying or confirming it“the ratification of the treaty”, “confirmation of the appointment”
(n)confirmationa ceremony held in the synagogue (usually at Pentecost) to admit as adult members of the Jewish community young men and women who have successfully completed a course of study in Judaism