night-sight vs scotopic vision

night-sight and scotopic vision both are nouns.

Word	Noun	Adjective	Verb	Adverb
night-sight	Yes	No	No	No
scotopic vision	Yes	No	No	No

As nouns, night-sight and scotopic vision are synonyms defined as:

night-sight and scotopic vision: the ability to see in reduced illumination (as in moonlight)

Other synonyms of night-sight include night vision, twilight vision.

night-sight (noun)	scotopic vision (noun)
the ability to see in reduced illumination (as in moonlight)	the ability to see in reduced illumination (as in moonlight)