multiply vs multiple

multiply is not a noun while multiple is a noun.

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

multiply (noun)	multiple (noun)
	the product of a quantity by an integer

multiply (adjective)	multiple (adjective)
	having or involving or consisting of more than one part or entity or individual

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