winnow out vs rule out

winnow out and rule out both are verbs.

Word	Noun	Adjective	Verb	Adverb
winnow out	No	No	Yes	No
rule out	No	No	Yes	No

As verbs, winnow out and rule out are synonyms defined as:

Other synonyms of winnow out include eliminate, reject.

winnow out (verb)	rule out (verb)
dismiss from consideration or a contest	dismiss from consideration or a contest
	include or exclude by determining judicially or in agreement with rules
	make impossible, especially beforehand