car maker vs car manufacturer

car maker and car manufacturer both are nouns.

Word	Noun	Adjective	Verb	Adverb
car maker	Yes	No	No	No
car manufacturer	Yes	No	No	No

As nouns, car maker and car manufacturer are synonyms defined as:

car maker and car manufacturer: a business engaged in the manufacture of automobiles

Other synonyms of car maker include auto maker, auto manufacturer, automaker, carmaker.

car maker (noun)	car manufacturer (noun)
a business engaged in the manufacture of automobiles	a business engaged in the manufacture of automobiles