extremity vs adversity

extremity and adversity both are nouns.

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

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

extremity: an extreme condition or state (especially of adversity or disease)
adversity: a state of misfortune or affliction

Other hypernyms of extremity include hard knocks, hardship.

extremity (noun)	adversity (noun)
an external body part that projects from the body	a stroke of ill fortune; a calamitous event
that part of a limb that is farthest from the torso	a state of misfortune or affliction
the outermost or farthest region or point
the greatest or utmost degree
an extreme condition or state (especially of adversity or disease)