saloon vs barrelhouse

saloon and barrelhouse both are nouns.

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

As nouns, barrelhouse is a hyponym of saloon; that is, barrelhouse is a word with a more specific, narrower meaning than saloon:

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

Other hyponyms of saloon include honky-tonk, cocktail lounge, sawdust saloon, speakeasy.

saloon (noun)	barrelhouse (noun)
a room or establishment where alcoholic drinks are served over a counter	a cheap drinking and dancing establishment
tavern consisting of a building with a bar and public rooms; often provides light meals
a car that is closed and that has front and rear seats and two or four doors