commuter vs passenger

commuter and passenger both are nouns.

Word	Noun	Adjective	Verb	Adverb
commuter	Yes	No	No	No
passenger	Yes	No	No	No

As nouns, passenger is a hypernym of commuter; that is, passenger is a word with a broader meaning than commuter:

commuter: someone who travels regularly from home in a suburb to work in a city
passenger: a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it

Other hypernyms of commuter include rider.

commuter (noun)	passenger (noun)
a passenger train that is ridden primarily by passengers who travel regularly from one place to another	a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it
someone who travels regularly from home in a suburb to work in a city