automaker vs carmaker

automaker and carmaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
automaker	Yes	No	No	No
carmaker	Yes	No	No	No

As nouns, automaker and carmaker are synonyms defined as:

automaker and carmaker: a business engaged in the manufacture of automobiles

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

automaker (noun)	carmaker (noun)
a business engaged in the manufacture of automobiles	a business engaged in the manufacture of automobiles