count on vs forecast

count on is not a noun while forecast is a noun.

Word	Noun	Adjective	Verb	Adverb
count on	No	No	Yes	No
forecast	Yes	No	Yes	No

As verbs, count on and forecast are synonyms defined as:

Other synonyms of count on include calculate, estimate, figure, reckon.

count on (noun)	forecast (noun)
	a prediction about how something (as the weather) will develop

count on (verb)	forecast (verb)
judge to be probable	judge to be probable
	predict in advance
	indicate, as with a sign or an omen