tow vs haulage

tow and haulage both are nouns.

Word	Noun	Adjective	Verb	Adverb
tow	Yes	No	Yes	No
haulage	Yes	No	No	No

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

tow: the act of hauling something (as a vehicle) by means of a hitch or rope
haulage: the act of drawing or hauling something

Other hypernyms of tow include draw, haul.

tow (noun)	haulage (noun)
the act of hauling something (as a vehicle) by means of a hitch or rope	the act of drawing or hauling something

tow (verb)	haulage (verb)
drag behind