predictive vs prognostic

predictive is not a noun while prognostic is a noun.

Word	Noun	Adjective	Verb	Adverb
predictive	No	Yes	No	No
prognostic	Yes	Yes	No	No

As adjectives, predictive and prognostic are synonyms defined as:

predictive and prognostic: of or relating to prediction; having value for making predictions

Other synonyms of predictive include prognosticative.

predictive (noun)	prognostic (noun)
	a sign of something about to happen

predictive (adjective)	prognostic (adjective)
of or relating to prediction; having value for making predictions	of or relating to prediction; having value for making predictions