affirmation vs affirm

affirmation is a noun but affirm is not a noun.

Word	Noun	Adjective	Verb	Adverb
affirmation	Yes	No	No	No
affirm	No	No	Yes	No

affirmation (noun)	affirm (noun)
a judgment by a higher court that the judgment of a lower court was correct and should stand
a statement asserting the existence or the truth of something
(religion) a solemn declaration that serves the same purpose as an oath (if an oath is objectionable to the person on religious or ethical grounds)
the act of affirming or asserting or stating something

affirmation (verb)	affirm (verb)
	establish or strengthen as with new evidence or facts
	to declare or affirm solemnly and formally as true
	say yes to