robe-de-chambre vs lounging robe

robe-de-chambre and lounging robe both are nouns.

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

As nouns, robe-de-chambre and lounging robe are synonyms defined as:

robe-de-chambre and lounging robe: a robe worn before dressing or while lounging

Other synonyms of robe-de-chambre include dressing gown.

robe-de-chambre (noun)	lounging robe (noun)
a robe worn before dressing or while lounging	a robe worn before dressing or while lounging