coach vs nonsmoker

coach and nonsmoker both are nouns.

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

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

coach (noun)	nonsmoker (noun)
a carriage pulled by four horses with one driver	a passenger car for passengers who want to avoid tobacco smoke
a railcar where passengers ride	a person who does not smoke tobacco
a vehicle carrying many passengers; used for public transport
a person who gives private instruction (as in singing, acting, etc.)
(sports) someone in charge of training an athlete or a team

coach (verb)	nonsmoker (verb)
teach and supervise (someone); act as a trainer or coach (to), as in sports
drive or operate a coach or carriage