cauliflower ear vs pinna

cauliflower ear and pinna both are nouns.

Word	Noun	Adjective	Verb	Adverb
cauliflower ear	Yes	No	No	No
pinna	Yes	No	No	No

As nouns, pinna is a hypernym of cauliflower ear; that is, pinna is a word with a broader meaning than cauliflower ear:

Other hypernyms of cauliflower ear include auricle, ear.

cauliflower ear (noun)	pinna (noun)
an auricle deformed by injury; common among boxers	the externally visible cartilaginous structure of the external ear
	division of a usually pinnately divided leaf