tramcar vs wagon

tramcar and wagon both are nouns.

Word	Noun	Adjective	Verb	Adverb
tramcar	Yes	No	No	No
wagon	Yes	No	No	No

As nouns, wagon is a hypernym of tramcar; that is, wagon is a word with a broader meaning than tramcar:

tramcar: a four-wheeled wagon that runs on tracks in a mine
wagon: any of various kinds of wheeled vehicles drawn by an animal or a tractor

Other hypernyms of tramcar include waggon.

tramcar (noun)	wagon (noun)
a four-wheeled wagon that runs on tracks in a mine	any of various kinds of wheeled vehicles drawn by an animal or a tractor
a wheeled vehicle that runs on rails and is propelled by electricity	a car that has a long body and rear door with space behind rear seat
	van used by police to transport prisoners
	a child's four-wheeled toy cart sometimes used for coasting