talk vs declaim

talk is a noun but declaim is not a noun.

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

talk (noun)	declaim (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)	declaim (verb)
express in speech	recite in elocution
exchange thoughts; talk with	speak against in an impassioned manner
reveal information
use language
deliver a lecture or talk
divulge confidential information or secrets