REINFORCEMENT
support, reinforcement, reenforcement
(noun) 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”
reward, reinforcement
(noun) an act performed to strengthen approved behavior
strengthener, reinforcement
(noun) 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”
reinforcement, reenforcement
(noun) information that makes more forcible or convincing; “his gestures provided eloquent reinforcement for his complaints”
Source: WordNet® 3.1
Etymology
Noun
reinforcement (countable and uncountable, plural reinforcements)
(uncountable) The act, process, or state of reinforcing or being reinforced.
(countable) A thing that reinforces.
(in the plural) Additional troops or materiel sent to support a military action.
(uncountable, behavioral psychology) The process whereby a behavior with desirable consequences comes to be repeated.
Source: Wiktionary
Re`in*force"ment (-ment), n.
Definition: See Reënforcement.
Source: Webster’s Unabridged Dictionary 1913 Edition