early vs previous

early and previous both are adjectives.

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

early (adjective)	previous (adjective)
at or near the beginning of a period of time or course of events or before the usual or expected time	too soon or too hasty
of an early stage in the development of a language or literature	(used especially of persons) of the immediate past
being or occurring at an early stage of development	just preceding something else in time or order
belonging to the distant past
very young
expected in the near future

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