internal ear vs sense organ

internal ear and sense organ both are nouns.

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

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

internal ear: a complex system of interconnecting cavities; concerned with 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 internal ear include receptor, sensory receptor.

internal ear (noun)	sense organ (noun)
a complex system of interconnecting cavities; concerned with 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