senescence vs agedness

senescence and agedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
senescence	Yes	No	No	No
agedness	Yes	No	No	No

As nouns, senescence and agedness are synonyms defined as:

senescence (noun)	agedness (noun)
the property characteristic of old age	the property characteristic of old age
the organic process of growing older and showing the effects of increasing age