car manufacturer vs car maker

car manufacturer and car maker both are nouns.

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

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

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

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

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