Open English Wordnet
Nouns
(n)support, reinforcement, reenforcementa 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”
(n)reinforcement, reenforcementinformation that makes more forcible or convincing“his gestures provided eloquent reinforcement for his complaints”
(n)reinforcing stimulus, reinforcer, reinforcement(psychology) a stimulus that strengthens or weakens the behavior that produced it
(n)strengthener, reinforcementa device designed to provide additional strength“the cardboard backing was just a strengthener”, “he used gummed reinforcements to hold the page in his notebook”