differentiate vs differentiator

differentiate is not a noun while differentiator is a noun.

Word	Noun	Adjective	Verb	Adverb
differentiate	No	No	Yes	No
differentiator	Yes	No	No	No

differentiate (noun)	differentiator (noun)
	a person who (or that which) differentiates

differentiate (verb)	differentiator (verb)
become distinct and acquire a different character
become different during development
evolve so as to lead to a new species or develop in a way most suited to the environment
calculate a derivative; take the derivative
mark as different
be a distinctive feature, attribute, or trait; sometimes in a very positive sense