incubate vs incubation

incubate is not a noun while incubation is a noun.

Word	Noun	Adjective	Verb	Adverb
incubate	No	No	Yes	No
incubation	Yes	No	No	No

incubate (noun)	incubation (noun)
	maintaining something at the most favorable temperature for its development
	sitting on eggs so as to hatch them by the warmth of the body
	(pathology) the phase in the development of an infection between the time a pathogen enters the body and the time the first symptoms appear

incubate (verb)	incubation (verb)
sit on (eggs)
grow under conditions that promote development