reinforcer vs reinforcing stimulus

reinforcer and reinforcing stimulus both are nouns.

Word	Noun	Adjective	Verb	Adverb
reinforcer	Yes	No	No	No
reinforcing stimulus	Yes	No	No	No

As nouns, reinforcer and reinforcing stimulus are synonyms defined as:

reinforcer and reinforcing stimulus: (psychology) a stimulus that strengthens or weakens the behavior that produced it

Other synonyms of reinforcer include reinforcement.

reinforcer (noun)	reinforcing stimulus (noun)
(psychology) a stimulus that strengthens or weakens the behavior that produced it	(psychology) a stimulus that strengthens or weakens the behavior that produced it