chair lift vs ski tow

chair lift and ski tow both are nouns.

Word	Noun	Adjective	Verb	Adverb
chair lift	Yes	No	No	No
ski tow	Yes	No	No	No

As nouns, ski tow is a hypernym of chair lift; that is, ski tow is a word with a broader meaning than chair lift:

chair lift: a ski lift on which riders (skiers or sightseers) are seated and carried up or down a mountainside; seats are hung from an endless overhead cable
ski tow: a powered conveyance that carries skiers up a hill

Other hypernyms of chair lift include lift, ski lift.

chair lift (noun)	ski tow (noun)
a ski lift on which riders (skiers or sightseers) are seated and carried up or down a mountainside; seats are hung from an endless overhead cable	a powered conveyance that carries skiers up a hill