buggy vs carriage

buggy and carriage both are nouns.

Word	Noun	Adjective	Verb	Adverb
buggy	Yes	Yes	No	No
carriage	Yes	No	No	No

As nouns, carriage is a hypernym of buggy; that is, carriage is a word with a broader meaning than buggy:

Other hypernyms of buggy include equipage, rig.

buggy (noun)	carriage (noun)
a small lightweight carriage; drawn by a single horse	a vehicle with wheels drawn by one or more horses
	a railcar where passengers ride
	a machine part that carries something else
	a small vehicle with four wheels in which a baby or child is pushed around
	characteristic way of bearing one's body

buggy (adjective)	carriage (adjective)
infested with bugs
informal or slang terms for mentally irregular