Pullman car vs coach

Pullman car and coach both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pullman car	Yes	No	No	No
coach	Yes	No	Yes	No

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

Other hypernyms of Pullman car include carriage, passenger car.

Pullman car (noun)	coach (noun)
luxurious passenger car; for day or night travel	a carriage pulled by four horses with one driver
	a railcar where passengers ride
	a vehicle carrying many passengers; used for public transport
	a person who gives private instruction (as in singing, acting, etc.)
	(sports) someone in charge of training an athlete or a team

Pullman car (verb)	coach (verb)
	teach and supervise (someone); act as a trainer or coach (to), as in sports
	drive or operate a coach or carriage