academic robe vs academic gown

academic robe and academic gown both are nouns.

Word	Noun	Adjective	Verb	Adverb
academic robe	Yes	No	No	No
academic gown	Yes	No	No	No

As nouns, academic robe and academic gown are synonyms defined as:

Other synonyms of academic robe include judge's robe.

academic robe (noun)	academic gown (noun)
a gown worn by academics or judges	a gown worn by academics or judges