nyctalopia vs night blindness

nyctalopia and night blindness both are nouns.

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

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

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

Other synonyms of nyctalopia include moon blindness.

nyctalopia (noun)	night blindness (noun)
inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder	inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder