trolley car vs tramcar

trolley car and tramcar both are nouns.

Word	Noun	Adjective	Verb	Adverb
trolley car	Yes	No	No	No
tramcar	Yes	No	No	No

As nouns, trolley car and tramcar are synonyms defined as:

trolley car and tramcar: a wheeled vehicle that runs on rails and is propelled by electricity

Other synonyms of trolley car include streetcar, tram, trolley.

trolley car (noun)	tramcar (noun)
a wheeled vehicle that runs on rails and is propelled by electricity	a four-wheeled wagon that runs on tracks in a mine
	a wheeled vehicle that runs on rails and is propelled by electricity