premature vs immature

premature and immature both are adjectives.

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

premature (adjective)	immature (adjective)
born after a gestation period of less than the normal time	not yet mature
uncommonly early or before the expected time	characteristic of a lack of maturity
too soon or too hasty	(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