immature vs early

immature and early both are adjectives.

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

immature (adjective)	early (adjective)
not yet mature	at or near the beginning of a period of time or course of events or before the usual or expected time
characteristic of a lack of maturity	of an early stage in the development of a language or literature
(used of living things especially persons) in an early period of life or development or growth	being or occurring at an early stage of development
(of birds) not yet having developed feathers	belonging to the distant past
not fully developed or mature; not ripe	very young
	expected in the near future

immature (adverb)	early (adverb)
	before the usual time or the time expected
	during an early stage
	in good time