robe vs clothe

robe is a noun but clothe is not a noun.

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

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

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

As verbs, robe and clothe are synonyms defined as:

Other synonyms of robe include cloak, drape.

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

robe (verb)	clothe (verb)
clothe formally; especially in ecclesiastical robes	provide with clothes or put clothes on
cover as if with clothing	cover as if with clothing
	furnish with power or authority; of kings or emperors