post chaise vs carriage

post chaise and carriage both are nouns.

Word	Noun	Adjective	Verb	Adverb
post chaise	Yes	No	No	No
carriage	Yes	No	No	No

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

post chaise: closed horse-drawn carriage with four wheels; formerly used to transport passengers and mail
carriage: a vehicle with wheels drawn by one or more horses

Other hypernyms of post chaise include equipage, rig.

post chaise (noun)	carriage (noun)
closed horse-drawn carriage with four wheels; formerly used to transport passengers and mail	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