four-in-hand vs carriage

four-in-hand and carriage both are nouns.

Word	Noun	Adjective	Verb	Adverb
four-in-hand	Yes	No	No	No
carriage	Yes	No	No	No

As nouns, carriage is a hypernym of four-in-hand; that is, carriage is a word with a broader meaning than four-in-hand:

Other hypernyms of four-in-hand include equipage, rig.

four-in-hand (noun)	carriage (noun)
a carriage pulled by four horses with one driver	a vehicle with wheels drawn by one or more horses
a long necktie that is tied in a slipknot with one end hanging in front of the other	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