indicate vs omen

indicate is not a noun while omen is a noun.

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

As verbs, omen is a hyponym of indicate; that is, omen is a word with a more specific, narrower meaning than indicate:

indicate (noun)	omen (noun)
	a sign of something about to happen

indicate (verb)	omen (verb)
to state or express briefly	indicate, as with a sign or an omen
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