sense organ vs ear

sense organ and ear both are nouns.

Word	Noun	Adjective	Verb	Adverb
sense organ	Yes	No	No	No
ear	Yes	No	No	No

As nouns, ear is a hyponym of sense organ; that is, ear is a word with a more specific, narrower meaning than sense organ:

sense organ: an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation
ear: the sense organ for hearing and equilibrium

sense organ (noun)	ear (noun)
an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation	the sense organ for hearing and equilibrium
	the externally visible cartilaginous structure of the external ear
	good hearing
	attention to what is said
	fruiting spike of a cereal plant especially corn