Collocations for reinforcement - noun

powerful
negative, positive
The children respond well to praise and positive reinforcement.

steel

provide
The instructor provides reinforcement to elicit the desired response.
The statement provides reinforcement for the view that tax cuts are likely.

receive
have
The windows have steel reinforcement.

need

police, troop

call for, call in, request, send for
The crowd was very large and police reinforcements were called in.

need
We need urgent reinforcements.

bring in, send

arrive
Reinforcements arrived too late.