saloon vs brougham

saloon and brougham both are nouns.

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

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

saloon: a car that is closed and that has front and rear seats and two or four doors
brougham: a sedan that has no roof over the driver's seat

saloon (noun)	brougham (noun)
a room or establishment where alcoholic drinks are served over a counter	a sedan that has no roof over the driver's seat
tavern consisting of a building with a bar and public rooms; often provides light meals	light carriage; pulled by a single horse
a car that is closed and that has front and rear seats and two or four doors