Pullman vs Pullman car

Pullman and Pullman car both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pullman	Yes	No	No	No
Pullman car	Yes	No	No	No

As nouns, Pullman and Pullman car are synonyms defined as:

Pullman and Pullman car: luxurious passenger car; for day or night travel

Pullman (noun)	Pullman car (noun)
luxurious passenger car; for day or night travel	luxurious passenger car; for day or night travel