prognosticate vs presage

prognosticate is not a noun while presage is a noun.

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

As verbs, prognosticate and presage are synonyms defined as:

Other synonyms of prognosticate include augur, auspicate, betoken, bode, forecast, foreshadow, foretell, omen, portend, predict, prefigure.

prognosticate (noun)	presage (noun)
	a sign of something about to happen
	a foreboding about what is about to happen

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