geezerhood vs senility

geezerhood and senility both are nouns.

Word	Noun	Adjective	Verb	Adverb
geezerhood	Yes	No	No	No
senility	Yes	No	No	No

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

geezerhood: a late time of life
senility: mental infirmity as a consequence of old age; sometimes shown by foolish infatuations

Other hyponyms of geezerhood include dotage, second childhood, autumn years, decrepitude.

geezerhood (noun)	senility (noun)
a late time of life	the state of being senile
	mental infirmity as a consequence of old age; sometimes shown by foolish infatuations