See also the Reform Judaism article about its Confirmation ceremony

Tenure at universities in Australia and New Zealand is referred to as confirmation

A verificationist is someone who adheres to the verification principle, a criterion for meaningfulness that requires a non-analytic, meaningful sentence to be either verifiable or falsifiable, though it was hotly disputed amongst verificationists...

The confirmation of a presidential nominee by the United States Senate; see advice and consent

Confirmation (composition), a bebop jazz standard by Charlie Parker

Confirmation, a Christian sacrament, also known as Chrismation in some churches