plagiarize vs plagiarism

plagiarize is not a noun while plagiarism is a noun.

Word	Noun	Adjective	Verb	Adverb
plagiarize	No	No	Yes	No
plagiarism	Yes	No	No	No

plagiarize (noun)	plagiarism (noun)
	the act of plagiarizing; taking someone's words or ideas as if they were your own
	a piece of writing that has been copied from someone else and is presented as being your own work

plagiarize (verb)	plagiarism (verb)
take without referencing from someone else's writing or speech; of intellectual property