quadruple vs quadruplicate

quadruple and quadruplicate both are nouns.

Word	Noun	Adjective	Verb	Adverb
quadruple	Yes	Yes	Yes	No
quadruplicate	Yes	Yes	Yes	No

As adjectives, quadruple and quadruplicate are synonyms defined as:

Other synonyms of quadruple include four-fold, fourfold, quadruplex.

quadruple (noun)	quadruplicate (noun)
a quantity that is four times as great as another	any four copies; any of four things that correspond to one another exactly
a set of four similar things considered as a unit

quadruple (adjective)	quadruplicate (adjective)
four times as great or many	having four units or components
having four units or components

quadruple (verb)	quadruplicate (verb)
increase fourfold	reproduce fourfold