carriage vs nonsmoker

carriage and nonsmoker both are nouns.

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

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

carriage (noun)	nonsmoker (noun)
a vehicle with wheels drawn by one or more horses	a passenger car for passengers who want to avoid tobacco smoke
a railcar where passengers ride	a person who does not smoke tobacco
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