advice vs indication

advice and indication both are nouns.

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

As nouns, indication is a hyponym of advice; that is, indication is a word with a more specific, narrower meaning than advice:

advice: a proposal for an appropriate course of action
indication: something (as a course of action) that is indicated as expedient or necessary

Other hyponyms of advice include recommendation, admonition, monition, warning, word of advice.

advice (noun)	indication (noun)
a proposal for an appropriate course of action	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