sawdust saloon vs barroom

sawdust saloon and barroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
sawdust saloon	Yes	No	No	No
barroom	Yes	No	No	No

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

sawdust saloon: a saloon whose floor is covered with sawdust
barroom: a room or establishment where alcoholic drinks are served over a counter

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

sawdust saloon (noun)	barroom (noun)
a saloon whose floor is covered with sawdust	a room or establishment where alcoholic drinks are served over a counter