paw vs extremity

paw and extremity both are nouns.

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

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

paw (noun)	extremity (noun)
a clawed foot of an animal especially a quadruped	an external body part that projects from the body
the (prehensile) extremity of the superior limb	that part of a limb that is farthest from the torso
	the outermost or farthest region or point
	the greatest or utmost degree
	an extreme condition or state (especially of adversity or disease)

paw (verb)	extremity (verb)
touch clumsily
scrape with the paws