night blindness vs moon blindness

night blindness and moon blindness both are nouns.

Word	Noun	Adjective	Verb	Adverb
night blindness	Yes	No	No	No
moon blindness	Yes	No	No	No

As nouns, night blindness and moon blindness are synonyms defined as:

night blindness and moon blindness: inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder

Other synonyms of night blindness include nyctalopia.

night blindness (noun)	moon blindness (noun)
inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder	recurrent eye inflammation in horses; sometimes resulting in blindness
	inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder