drawing-room car vs parlor car

drawing-room car and parlor car both are nouns.

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

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

drawing-room car and parlor 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, parlour car.

drawing-room car (noun)	parlor 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