chair car vs drawing-room car

chair car and drawing-room car both are nouns.

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

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

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

Other synonyms of chair car include palace car, parlor car, parlour car.

chair car (noun)	drawing-room 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