age vs years

age and years both are nouns.

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

As nouns, age and years are synonyms defined as:

Other synonyms of age include eld, geezerhood, old age.

As nouns, age and years are synonyms defined as:

Other synonyms of age include long time.

age (noun)	years (noun)
how long something has existed	a late time of life
a time of life (usually defined in years) at which some particular qualification or power arises	a prolonged period of time
a late time of life	the time during which someone's life continues
an era of history having some distinctive feature
a prolonged period of time