English Antonyms Practice Test 7

Co-operation : the action or process of working together to the same end.
Rebellion : an act of armed resistance to an established government or leader.
Resistance : the refusal to accept or comply with something.
Hindrance : a thing that provides resistance, delay, or obstruction to something or someone.
Opposition : resistance or dissent, expressed in action or argument.

Antonym of Co-operation is Opposition