age vs antiquity

age and antiquity both are nouns.

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

As nouns, antiquity is a hyponym of age; that is, antiquity is a word with a more specific, narrower meaning than age:

Other hyponyms of age include golden age, Jazz Age, reign, turn of the century, literary period.

age (noun)	antiquity (noun)
how long something has existed	an artifact surviving from the past
a time of life (usually defined in years) at which some particular qualification or power arises	extreme oldness
a late time of life	the historic period preceding the Middle Ages in Europe
an era of history having some distinctive feature
a prolonged period of time