iteration vs iterate

iteration is a noun but iterate is not a noun.

Word	Noun	Adjective	Verb	Adverb
iteration	Yes	No	No	No
iterate	No	No	Yes	No

iteration (noun)	iterate (noun)
doing or saying again; a repeated performance
(computer science) executing the same set of instructions a given number of times or until a specified result is obtained
(computer science) a single execution of a set of instructions that are to be repeated

iteration (verb)	iterate (verb)
	run or be performed again
	to say, state, or perform again