chair car vs parlor car

chair car and parlor car both are nouns.

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

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

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

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

chair 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