lounging robe vs dressing gown

lounging robe and dressing gown both are nouns.

Word	Noun	Adjective	Verb	Adverb
lounging robe	Yes	No	No	No
dressing gown	Yes	No	No	No

As nouns, lounging robe and dressing gown are synonyms defined as:

lounging robe and dressing gown: a robe worn before dressing or while lounging

Other synonyms of lounging robe include robe-de-chambre.

lounging robe (noun)	dressing gown (noun)
a robe worn before dressing or while lounging	a robe worn before dressing or while lounging