prognostication vs prognosticate

prognostication is a noun but prognosticate is not a noun.

Word	Noun	Adjective	Verb	Adverb
prognostication	Yes	No	No	No
prognosticate	No	No	Yes	No

prognostication (noun)	prognosticate (noun)
knowledge of the future (usually said to be obtained from a divine source)
a statement made about the future
a sign of something about to happen

prognostication (verb)	prognosticate (verb)
	make a prediction about; tell in advance
	indicate, as with a sign or an omen