hearing vs exteroception

hearing and exteroception both are nouns.

Word	Noun	Adjective	Verb	Adverb
hearing	Yes	Yes	No	No
exteroception	Yes	No	No	No

As nouns, exteroception is a hypernym of hearing; that is, exteroception is a word with a broader meaning than hearing:

Other hypernyms of hearing include modality, sense modality, sensory system.

hearing (noun)	exteroception (noun)
the act of hearing attentively	sensitivity to stimuli originating outside of the body
(law) a proceeding (usually by a court) where evidence is taken for the purpose of determining an issue of fact and reaching a decision based on that evidence
the ability to hear; the auditory faculty
a session (of a committee or grand jury) in which witnesses are called and testimony is taken
the range within which a voice can be heard
an opportunity to state your case and be heard

hearing (adjective)	exteroception (adjective)
able to perceive sound