talk vs talker

talk and talker both are nouns.

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

talk (noun)	talker (noun)
the act of giving a talk to an audience	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
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)	talker (verb)
express in speech
exchange thoughts; talk with
reveal information
use language
deliver a lecture or talk
divulge confidential information or secrets