tow vs haul

tow and haul both are nouns.

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

As nouns, haul is a hypernym of tow; that is, haul 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
haul: the act of drawing or hauling something

Other hypernyms of tow include draw, haulage.

tow (noun)	haul (noun)
the act of hauling something (as a vehicle) by means of a hitch or rope	the act of drawing or hauling something
	the quantity that was caught

tow (verb)	haul (verb)
drag behind	transport in a vehicle
	draw slowly or heavily