autumn years vs geezerhood

autumn years and geezerhood both are nouns.

Word	Noun	Adjective	Verb	Adverb
autumn years	Yes	No	No	No
geezerhood	Yes	No	No	No

As nouns, geezerhood is a hypernym of autumn years; that is, geezerhood is a word with a broader meaning than autumn years:

autumn years: (literary) the later years of one's life, especially after one has finished their career.
geezerhood: a late time of life

Other hypernyms of autumn years include age, eld, old age, years.

autumn years (noun)	geezerhood (noun)
(literary) the later years of one's life, especially after one has finished their career.	a late time of life