sight vs exteroception

sight and exteroception both are nouns.

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

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

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

sight (noun)	exteroception (noun)
the act of looking or seeing or observing	sensitivity to stimuli originating outside of the body
the ability to see; the visual faculty
an instance of visual perception
the range of vision
a range of mental vision
a place of interest, especially to visitors
anything that is seen
(often followed by `of') a large number or amount or extent

sight (verb)	exteroception (verb)
catch sight of; to perceive with the eyes
take aim by looking through the sights of a gun (or other device)