Pullman vs carriage

Pullman and carriage both are nouns.

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

As nouns, carriage is a hypernym of Pullman; that is, carriage is a word with a broader meaning than Pullman:

Other hypernyms of Pullman include coach, passenger car.

Pullman (noun)	carriage (noun)
luxurious passenger car; for day or night travel	a vehicle with wheels drawn by one or more horses
	a railcar where passengers ride
	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