inchoative vs immature

inchoative is a noun but immature is not a noun.

Word	Noun	Adjective	Verb	Adverb
inchoative	Yes	Yes	No	No
immature	No	Yes	No	No

inchoative (noun)	immature (noun)
aspect with regard to the beginning of the action of the verb

inchoative (adjective)	immature (adjective)
in an initial stage	not yet mature
	characteristic of a lack of maturity
	(used of living things especially persons) in an early period of life or development or growth
	(of birds) not yet having developed feathers
	not fully developed or mature; not ripe