barrelhouse vs barroom

barrelhouse and barroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
barrelhouse	Yes	No	No	No
barroom	Yes	No	No	No

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

barrelhouse: a cheap drinking and dancing establishment
barroom: a room or establishment where alcoholic drinks are served over a counter

Other hypernyms of barrelhouse include bar, ginmill, saloon, taproom.

barrelhouse (noun)	barroom (noun)
a cheap drinking and dancing establishment	a room or establishment where alcoholic drinks are served over a counter