pes cavus vs deformity

pes cavus and deformity both are nouns.

Word	Noun	Adjective	Verb	Adverb
pes cavus	Yes	No	No	No
deformity	Yes	No	No	No

As nouns, deformity is a hypernym of pes cavus; that is, deformity is a word with a broader meaning than pes cavus:

pes cavus: a deformity of the foot characterized by an abnormally high arch and hyperextension of the toes which gives the foot the appearance of a claw
deformity: an affliction in which some part of the body is misshapen or malformed

Other hypernyms of pes cavus include malformation, misshapenness.

pes cavus (noun)	deformity (noun)
a deformity of the foot characterized by an abnormally high arch and hyperextension of the toes which gives the foot the appearance of a claw	an appearance that has been spoiled or is misshapen
	an affliction in which some part of the body is misshapen or malformed