see vs tour

see and tour both are nouns.

Word	Noun	Adjective	Verb	Adverb
see	Yes	No	Yes	No
tour	Yes	No	Yes	No

As verbs, tour is a hypernym of see; that is, tour is a word with a broader meaning than see:

see (noun)	tour (noun)
the seat within a bishop's diocese where his cathedral is located	a journey or route all the way around a particular place or area
	a time period for working (after which you will be relieved by someone else)
	a period of time spent in military service

see (verb)	tour (verb)
deem to be	make a tour of a certain place
perceive (an idea or situation) mentally
get to know or become aware of, usually accidentally
be careful or certain to do something; make certain of something
deliberate or decide
make sense of; assign a meaning to
find out, learn, or determine with certainty, usually by making an inquiry or other effort
match or meet
receive as a specified guest
imagine; conceive of; see in one's mind
come together
conduct someone someplace
perceive by sight or have the power to perceive by sight
perceive or be contemporaneous with
see or watch
see and understand, have a good eye
observe as if with an eye
undergo or live through a difficult experience
observe, check out, and look over carefully or inspect
date regularly; have a steady relationship with
go to see a place, as for entertainment
go to see for professional or business reasons
go to see for a social visit
take charge of or deal with