ear vs sense organ

ear and sense organ both are nouns.

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

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

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

Other hypernyms of ear include receptor, sensory receptor.

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