come on vs climb

come on is not a noun while climb is a noun.

Word	Noun	Adjective	Verb	Adverb
come on	No	No	Yes	No
climb	Yes	No	Yes	No

As verbs, climb is a hyponym of come on; that is, climb is a word with a more specific, narrower meaning than come on:

Other hyponyms of come on include leapfrog.

come on (noun)	climb (noun)
	the act of climbing something
	an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)
	an upward slope or grade (as in a road)

come on (verb)	climb (verb)
occur or become available	go up or advance
appear or become visible; make a showing	increase in value or to a higher point
develop in a positive way	improve one's social status
start running, functioning, or operating	go upward with gradual or continuous progress
move towards	move with effort, by grasping
	slope upward