dressing gown vs lounging robe

dressing gown and lounging robe both are nouns.

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

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

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

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

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