multiple vs multiply

multiple is a noun but multiply is not a noun.

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

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

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

multiple (verb)	multiply (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

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