incentive stock option vs incentive option

incentive stock option and incentive option both are nouns.

Word	Noun	Adjective	Verb	Adverb
incentive stock option	Yes	No	No	No
incentive option	Yes	No	No	No

As nouns, incentive stock option and incentive option are synonyms defined as:

incentive stock option and incentive option: an option granted to corporate executives if the company achieves certain financial goals

incentive stock option (noun)	incentive option (noun)
an option granted to corporate executives if the company achieves certain financial goals	an option granted to corporate executives if the company achieves certain financial goals