simulate vs simulation

simulate is not a noun while simulation is a noun.

Word	Noun	Adjective	Verb	Adverb
simulate	No	No	Yes	No
simulation	Yes	No	No	No

simulate (noun)	simulation (noun)
	the act of giving a false appearance
	the act of imitating the behavior of some situation or some process by means of something suitably analogous (especially for the purpose of study or personnel training)
	representation of something (sometimes on a smaller scale)
	(computer science) the technique of representing the real world by a computer program

simulate (verb)	simulation (verb)
make a pretence of
create a representation or simulation of
reproduce someone's behavior or looks