concur

intransitive verb | \ kən-ˈkər \ | con·cur

1. : to happen at the same time

2. : to express agreement he shall have power…to make treaties, provided two-thirds of the Senators present concur —U.S. Constitution art. II specifically : to join in an appellate decision — compare dissent : to join in an appellate decision — compare dissent

   Note: A judge or justice may concur with the decision of the court but not agree with the reasons set forth in the opinion. Often a separate opinion is written in such a case.