hackney vs carriage

hackney and carriage both are nouns.

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

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

Other hypernyms of hackney include equipage, rig.

hackney (noun)	carriage (noun)
a compact breed of harness horse	a vehicle with wheels drawn by one or more horses
a carriage for hire	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