gustation vs exteroception

gustation and exteroception both are nouns.

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

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

gustation: the faculty of distinguishing sweet, sour, bitter, and salty properties in the mouth
exteroception: sensitivity to stimuli originating outside of the body

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

gustation (noun)	exteroception (noun)
the faculty of distinguishing sweet, sour, bitter, and salty properties in the mouth	sensitivity to stimuli originating outside of the body