commuter vs passenger train

commuter and passenger train both are nouns.

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

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

commuter: a passenger train that is ridden primarily by passengers who travel regularly from one place to another
passenger train: a train that carries passengers

commuter (noun)	passenger train (noun)
a passenger train that is ridden primarily by passengers who travel regularly from one place to another	a train that carries passengers
someone who travels regularly from home in a suburb to work in a city