robe vs garment

robe and garment both are nouns.

Word	Noun	Adjective	Verb	Adverb
robe	Yes	No	Yes	No
garment	Yes	No	Yes	No

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

As verbs, garment is a hypernym of robe; that is, garment is a word with a broader meaning than robe:

Other hypernyms of robe include apparel, clothe, dress, enclothe, fit out, garb, habilitate, raiment, tog.

robe (noun)	garment (noun)
any loose flowing garment	an article of clothing
outerwear consisting of a long flowing garment used for official or ceremonial occasions

robe (verb)	garment (verb)
clothe formally; especially in ecclesiastical robes	provide with clothes or put clothes on
cover as if with clothing