indicate vs indication

indicate is not a noun while indication is a noun.

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

indicate (noun)	indication (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

indicate (verb)	indication (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