talk vs communicate

talk is a noun but communicate is not a noun.

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

As verbs, communicate is a hypernym of talk; that is, communicate is a word with a broader meaning than talk:

Other hypernyms of talk include intercommunicate.

As verbs, communicate is a hypernym of talk; that is, communicate is a word with a broader meaning than talk:

Other hypernyms of talk include intercommunicate.

As verbs, communicate is a hypernym of talk; that is, communicate is a word with a broader meaning than talk:

Other hypernyms of talk include intercommunicate.

talk (noun)	communicate (noun)
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')

talk (verb)	communicate (verb)
express in speech	transmit thoughts or feelings
exchange thoughts; talk with	transmit information
reveal information	be in verbal contact; interchange information or ideas
use language	receive Communion, in the Catholic church
deliver a lecture or talk	administer Communion; in church
divulge confidential information or secrets	join or connect
	transfer to another