early vs immature

early and immature both are adjectives.

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

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

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