predictor vs forecaster

predictor and forecaster both are nouns.

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

As nouns, predictor and forecaster are synonyms defined as:

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

Other synonyms of predictor include prognosticator, soothsayer.

predictor (noun)	forecaster (noun)
a computer for controlling antiaircraft fire that computes the position of an aircraft at the instant of a shell's arrival	someone who makes predictions of the future (usually on the basis of special knowledge)
information that supports a probabilistic estimate of future events
someone who makes predictions of the future (usually on the basis of special knowledge)