ski tow vs rope tow

ski tow and rope tow both are nouns.

Word	Noun	Adjective	Verb	Adverb
ski tow	Yes	No	No	No
rope tow	Yes	No	No	No

As nouns, rope tow is a hyponym of ski tow; that is, rope tow is a word with a more specific, narrower meaning than ski tow:

Other hyponyms of ski tow include chair lift, chairlift, surface lift.

ski tow (noun)	rope tow (noun)
a powered conveyance that carries skiers up a hill	a ski tow offering only a moving rope to hold onto