immature vs premature

immature and premature both are adjectives.

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

immature (adjective)	premature (adjective)
not yet mature	born after a gestation period of less than the normal time
characteristic of a lack of maturity	uncommonly early or before the expected time
(used of living things especially persons) in an early period of life or development or growth	too soon or too hasty
(of birds) not yet having developed feathers
not fully developed or mature; not ripe