early vs archaean

early and archaean both are adjectives.

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

early (adjective)	archaean (adjective)
at or near the beginning of a period of time or course of events or before the usual or expected time	of or relating to the earliest known rocks formed during the Precambrian Eon
of an early stage in the development of a language or literature
being or occurring at an early stage of development
belonging to the distant past
very young
expected in the near future

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