say vs talk

say and talk both are nouns.

Word	Noun	Adjective	Verb	Adverb
say	Yes	No	Yes	No
talk	Yes	No	Yes	No

say (noun)	talk (noun)
the chance to speak	the act of giving a talk to an audience
	an exchange of ideas via conversation
	idle gossip or rumor
	a speech that is open to the public
	discussion; (`talk about' is a less formal alternative for `discussion of')

say (verb)	talk (verb)
express in words	express in speech
report or maintain	exchange thoughts; talk with
speak, pronounce, or utter in a certain way	reveal information
express a supposition	use language
give instructions to or direct somebody to do something with authority	deliver a lecture or talk
communicate or express nonverbally	divulge confidential information or secrets
recite or repeat a fixed text
indicate
state as one's opinion or judgement; declare
utter aloud
have or contain a certain wording or form