cart vs garden cart

cart and garden cart both are nouns.

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

As nouns, garden cart is a hyponym of cart; that is, garden cart is a word with a more specific, narrower meaning than cart:

cart: wheeled vehicle that can be pushed by a person; may have one or two or four wheels
garden cart: a cart for carrying small loads; has handles and one or more wheels

cart (noun)	garden cart (noun)
a heavy open wagon usually having two wheels and drawn by an animal	a cart for carrying small loads; has handles and one or more wheels
wheeled vehicle that can be pushed by a person; may have one or two or four wheels

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