judge's robe vs robe

judge's robe and robe both are nouns.

Word	Noun	Adjective	Verb	Adverb
judge's robe	Yes	No	No	No
robe	Yes	No	Yes	No

As nouns, robe is a hypernym of judge's robe; that is, robe is a word with a broader meaning than judge's robe:

judge's robe: a gown worn by academics or judges
robe: outerwear consisting of a long flowing garment used for official or ceremonial occasions

Other hypernyms of judge's robe include gown.

judge's robe (noun)	robe (noun)
a gown worn by academics or judges	any loose flowing garment
	outerwear consisting of a long flowing garment used for official or ceremonial occasions

judge's robe (verb)	robe (verb)
	clothe formally; especially in ecclesiastical robes
	cover as if with clothing