talk vs speak

talk is a noun but speak is not a noun.

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

As verbs, talk and speak are synonyms defined as:

Other synonyms of talk include mouth, utter, verbalise, verbalize.

As verbs, talk and speak are synonyms defined as:

As verbs, talk and speak are synonyms defined as:

talk (noun)	speak (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)	speak (verb)
express in speech	express in speech
exchange thoughts; talk with	exchange thoughts; talk with
reveal information	use language
use language	give a speech to
deliver a lecture or talk	make a characteristic or natural sound
divulge confidential information or secrets