robe-de-chambre vs robe

robe-de-chambre and robe both are nouns.

Word	Noun	Adjective	Verb	Adverb
robe-de-chambre	Yes	No	No	No
robe	Yes	No	Yes	No

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

robe-de-chambre (noun)	robe (noun)
a robe worn before dressing or while lounging	any loose flowing garment
	outerwear consisting of a long flowing garment used for official or ceremonial occasions

robe-de-chambre (verb)	robe (verb)
	clothe formally; especially in ecclesiastical robes
	cover as if with clothing