nadir vs adversity

nadir and adversity both are nouns.

Word	Noun	Adjective	Verb	Adverb
nadir	Yes	No	No	No
adversity	Yes	No	No	No

As nouns, adversity is a hypernym of nadir; that is, adversity is a word with a broader meaning than nadir:

Other hypernyms of nadir include hard knocks, hardship.

nadir (noun)	adversity (noun)
the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected	a stroke of ill fortune; a calamitous event
an extreme state of adversity; the lowest point of anything	a state of misfortune or affliction