circulate vs travel

circulate is not a noun while travel is a noun.

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

As verbs, travel is a hypernym of circulate; that is, travel is a word with a broader meaning than circulate:

Other hypernyms of circulate include go, locomote, move.

As verbs, travel is a hypernym of circulate; that is, travel is a word with a broader meaning than circulate:

Other hypernyms of circulate include go, locomote, move.

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

circulate (verb)	travel (verb)
cause to become widely known	change location; move, travel, or proceed, also metaphorically
become widely known and passed on	make a trip for pleasure
move around freely from person to person or from place to place	travel upon or across
move through a space, circuit or system, returning to the starting point	undergo transportation as in a vehicle
cause to be distributed	undertake a journey or trip
cause to move in a circuit or system	travel from place to place, as for the purpose of finding work, preaching, or acting as a judge