intensify vs intensifier

intensify is not a noun while intensifier is a noun.

Word	Noun	Adjective	Verb	Adverb
intensify	No	No	Yes	No
intensifier	Yes	No	No	No

intensify (noun)	intensifier (noun)
	a modifier that has little meaning except to intensify the meaning it modifies

intensify (verb)	intensifier (verb)
become more intense
make more intense, stronger, or more marked
increase in extent or intensity
make the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark