antiquity vs oldness

antiquity and oldness both are nouns.

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

As nouns, oldness is a hypernym of antiquity; that is, oldness is a word with a broader meaning than antiquity:

antiquity (noun)	oldness (noun)
an artifact surviving from the past	the quality of being old; the opposite of newness
extreme oldness	the opposite of youngness
the historic period preceding the Middle Ages in Europe