incentive vs incentive scheme

incentive and incentive scheme both are nouns.

Word	Noun	Adjective	Verb	Adverb
incentive	Yes	No	No	No
incentive scheme	Yes	No	No	No

incentive (noun)	incentive scheme (noun)
a positive motivational influence	a formal scheme for inducing someone (as employees) to do something
an additional payment (or other remuneration) to employees as a means of increasing output