carriage vs diner

carriage and diner both are nouns.

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

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

carriage (noun)	diner (noun)
a vehicle with wheels drawn by one or more horses	a passenger car where food is served in transit
a railcar where passengers ride	a restaurant that resembles a dining car
a machine part that carries something else	a person eating a meal (especially in a restaurant)
a small vehicle with four wheels in which a baby or child is pushed around
characteristic way of bearing one's body