Catch up and Caught up

Catch up verb - To catch or hold as if in a net.

Caught up is a synonym for catch up. In some cases you can use "Caught up" instead a verb "Catch up".

Caught up adjective - Having become involved involuntarily.

Catch up is a synonym for caught up in entrance topic. You can use "Catch up" instead a verb "Caught up", if it concerns topics such as grip, captivate, embroil, come nearer.