indicator vs indicate

indicator is a noun but indicate is not a noun.

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

indicator (noun)	indicate (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

indicator (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