cocktail lounge vs barroom

cocktail lounge and barroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
cocktail lounge	Yes	No	No	No
barroom	Yes	No	No	No

As nouns, barroom is a hypernym of cocktail lounge; that is, barroom is a word with a broader meaning than cocktail lounge:

cocktail lounge: a barroom in a hotel or restaurant where cocktails are served
barroom: a room or establishment where alcoholic drinks are served over a counter

Other hypernyms of cocktail lounge include bar, ginmill, saloon, taproom.

cocktail lounge (noun)	barroom (noun)
a barroom in a hotel or restaurant where cocktails are served	a room or establishment where alcoholic drinks are served over a counter