multiply vs multiplier

multiply is not a noun while multiplier is a noun.

Word	Noun	Adjective	Verb	Adverb
multiply	No	No	Yes	Yes
multiplier	Yes	No	No	No

multiply (noun)	multiplier (noun)
	the number by which a multiplicand is multiplied

multiply (verb)	multiplier (verb)
have young (animals) or reproduce (organisms)
have offspring or produce more individuals of a given animal or plant
combine or increase by multiplication
make multiple copies of
combine by multiplication

multiply (adverb)	multiplier (adverb)
in several ways; in a multiple manner