trolley car vs streetcar

trolley car and streetcar both are nouns.

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

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

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

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

trolley car (noun)	streetcar (noun)
a wheeled vehicle that runs on rails and is propelled by electricity	a wheeled vehicle that runs on rails and is propelled by electricity