water travel vs travel

water travel and travel both are nouns.

Word	Noun	Adjective	Verb	Adverb
water travel	Yes	No	No	No
travel	Yes	No	Yes	No

As nouns, travel is a hypernym of water travel; that is, travel is a word with a broader meaning than water travel:

Other hypernyms of water travel include traveling, travelling.

water travel (noun)	travel (noun)
travel by water	the act of going from one place to another
	self-propelled movement
	a movement through space that changes the location of something

water travel (verb)	travel (verb)
	change location; move, travel, or proceed, also metaphorically
	make a trip for pleasure
	travel upon or across
	undergo transportation as in a vehicle
	undertake a journey or trip
	travel from place to place, as for the purpose of finding work, preaching, or acting as a judge