horse cart vs cart

horse cart and cart both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse cart	Yes	No	No	No
cart	Yes	No	Yes	No

As nouns, cart is a hypernym of horse cart; that is, cart is a word with a broader meaning than horse cart:

horse cart (noun)	cart (noun)
heavy cart; drawn by a horse; used for farm work	a heavy open wagon usually having two wheels and drawn by an animal
	wheeled vehicle that can be pushed by a person; may have one or two or four wheels

horse cart (verb)	cart (verb)
	draw slowly or heavily
	transport something in a cart