towage vs haulage

towage and haulage both are nouns.

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

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

towage: 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 towage include draw, haul.

towage (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