Collocations for opposite - noun

complete, direct, exact, precise, very | polar

be the case, be true
The oboe tends to lose power in the upper register, but with the clarinet the opposite is the case.

the ~ of/to
Doubt is not the opposite of faith - unbelief is. | In temperament, she was the complete opposite to her sister.

exactly/just/quite the opposite
The effect was exactly the opposite to what he intended.