forecaster vs prognosticator

forecaster and prognosticator both are nouns.

Word	Noun	Adjective	Verb	Adverb
forecaster	Yes	No	No	No
prognosticator	Yes	No	No	No

As nouns, forecaster and prognosticator are synonyms defined as:

forecaster and prognosticator: someone who makes predictions of the future (usually on the basis of special knowledge)

Other synonyms of forecaster include predictor, soothsayer.

forecaster (noun)	prognosticator (noun)
someone who makes predictions of the future (usually on the basis of special knowledge)	someone who makes predictions of the future (usually on the basis of special knowledge)