prognosticative vs prognostic

prognosticative is not a noun while prognostic is a noun.

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

As adjectives, prognosticative and prognostic are synonyms defined as:

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

Other synonyms of prognosticative include predictive.

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

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