indicate vs indicator

indicate is not a noun while indicator is a noun.

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

indicate (noun)	indicator (noun)
	a device for showing the operating condition of some system
	a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
	a signal for attracting attention
	(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction

indicate (verb)	indicator (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