eighties vs age

eighties and age both are nouns.

Word	Noun	Adjective	Verb	Adverb
eighties	Yes	No	No	No
age	Yes	No	Yes	No

eighties (noun)	age (noun)
the time of life between 80 and 90	how long something has existed
the decade from 1980 to 1989	a time of life (usually defined in years) at which some particular qualification or power arises
the decade from 1880 to 1889	a late time of life
	an era of history having some distinctive feature
	a prolonged period of time