Reinforcement
WordNet
noun
(1) A military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission
"They called for artillery support"
(2) An act performed to strengthen approved behavior
(3) A device designed to provide additional strength
"The cardboard backing was just a strengthener"
"He used gummed reinforcements to hold the page in his notebook"
(4) (psychology) a stimulus that strengthens or weakens the behavior that produced it
(5) Information that makes more forcible or convincing
"His gestures provided eloquent reinforcement for his complaints"