dotage vs age

dotage and age both are nouns.

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

As nouns, age is a hypernym of dotage; that is, age is a word with a broader meaning than dotage:

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

Other hypernyms of dotage include eld, geezerhood, old age, years.

dotage (noun)	age (noun)
mental infirmity as a consequence of old age; sometimes shown by foolish infatuations	how long something has existed
	a time of life (usually defined in years) at which some particular qualification or power arises
	a late time of life
	an era of history having some distinctive feature
	a prolonged period of time