chair car vs parlour car

chair car and parlour car both are nouns.

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

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

chair car and parlour 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, parlor car.

chair car (noun)	parlour 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