indication vs indicate

indication is a noun but indicate is not a noun.

Word	Noun	Adjective	Verb	Adverb
indication	Yes	No	No	No
indicate	No	No	Yes	No

indication (noun)	indicate (noun)
a datum about some physical state that is presented to a user by a meter or similar instrument
something that serves to indicate or suggest
the act of indicating or pointing out by name
(medicine) a reason to prescribe a drug or perform a procedure
something (as a course of action) that is indicated as expedient or necessary

indication (verb)	indicate (verb)
	to state or express briefly
	be a signal for or a symptom of
	give evidence of
	indicate a place, direction, person, or thing; either spatially or figuratively
	suggest the necessity of an intervention; in medicine