iterate vs iteration

iterate is not a noun while iteration is a noun.

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

iterate (noun)	iteration (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

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