parlour car vs palace car

parlour car and palace car both are nouns.

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

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

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

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

parlour 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