Affirm and Contend

Affirm verb - To state as a fact usually forcefully.

Contend is a synonym for affirm in approve topic. In some cases you can use "Contend" instead a verb "Affirm", when it comes to topics like announce, assert, aver. popular alternative

Contend verb - To state (something) as a reason in support of or against something under consideration.

Affirm is a synonym for contend in assert topic. You can use "Affirm" instead a verb "Contend", if it concerns topics such as argue, approve, announce, aver. popular alternative