drawing-room car vs palace car

drawing-room car and palace car both are nouns.

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

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

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

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

drawing-room car (noun)	palace 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