inner ear vs sensory receptor

inner ear and sensory receptor both are nouns.

Word	Noun	Adjective	Verb	Adverb
inner ear	Yes	No	No	No
sensory receptor	Yes	No	No	No

As nouns, sensory receptor is a hypernym of inner ear; that is, sensory receptor is a word with a broader meaning than inner ear:

inner ear: a complex system of interconnecting cavities; concerned with hearing and equilibrium
sensory receptor: 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 inner ear include receptor, sense organ.

inner ear (noun)	sensory receptor (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