simulate vs simulator

simulate is not a noun while simulator is a noun.

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

simulate (noun)	simulator (noun)
	a machine that simulates an environment for the purpose of training or research

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