palace car vs chair car

palace car and chair car both are nouns.

Word	Noun	Adjective	Verb	Adverb
palace car	Yes	No	No	No
chair car	Yes	No	No	No

As nouns, palace car and chair car are synonyms defined as:

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

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

palace car (noun)	chair 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