dotage vs eld

dotage and eld both are nouns.

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

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

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

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

dotage (noun)	eld (noun)
mental infirmity as a consequence of old age; sometimes shown by foolish infatuations	a late time of life
	a time of life (usually defined in years) at which some particular qualification or power arises