alexia vs visual aphasia

alexia and visual aphasia both are nouns.

Word	Noun	Adjective	Verb	Adverb
alexia	Yes	No	No	No
visual aphasia	Yes	No	No	No

As nouns, alexia and visual aphasia are synonyms defined as:

Other synonyms of alexia include word blindness.

alexia (noun)	visual aphasia (noun)
inability to perceive written words	inability to perceive written words