drawing-room car vs parlour car

drawing-room car and parlour car both are nouns.

Word	Noun	Adjective	Verb	Adverb
drawing-room car	Yes	No	No	No
parlour car	Yes	No	No	No

As nouns, drawing-room car and parlour car are synonyms defined as:

drawing-room car and parlour car: a passenger car for day travel; you pay extra fare for individual chairs

Other synonyms of drawing-room car include chair car, palace car, parlor car.

drawing-room car (noun)	parlour car (noun)
a passenger car for day travel; you pay extra fare for individual chairs	a passenger car for day travel; you pay extra fare for individual chairs