carriage vs brougham

carriage and brougham both are nouns.

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

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

carriage (noun)	brougham (noun)
a vehicle with wheels drawn by one or more horses	a sedan that has no roof over the driver's seat
a railcar where passengers ride	light carriage; pulled by a single horse
a machine part that carries something else
a small vehicle with four wheels in which a baby or child is pushed around
characteristic way of bearing one's body