doldrums vs inactivity

doldrums and inactivity both are nouns.

Word	Noun	Adjective	Verb	Adverb
doldrums	Yes	No	No	No
inactivity	Yes	No	No	No

As nouns, inactivity is a hypernym of doldrums; that is, inactivity is a word with a broader meaning than doldrums:

Other hypernyms of doldrums include inaction, inactiveness.

doldrums (noun)	inactivity (noun)
a belt of calms and light winds between the northern and southern trade winds of the Atlantic and Pacific	being inactive; being less active
a state of inactivity (in business or art etc)	a disposition to remain inactive or inert
	the state of being inactive