motorcar vs automobile

motorcar and automobile both are nouns.

Word	Noun	Adjective	Verb	Adverb
motorcar	Yes	No	No	No
automobile	Yes	No	Yes	No

As nouns, motorcar and automobile are synonyms defined as:

motorcar and automobile: a motor vehicle with four wheels; usually propelled by an internal combustion engine

Other synonyms of motorcar include auto, car, machine.

motorcar (noun)	automobile (noun)
a motor vehicle with four wheels; usually propelled by an internal combustion engine	a motor vehicle with four wheels; usually propelled by an internal combustion engine

motorcar (verb)	automobile (verb)
	travel in an automobile