plagiarizer vs plagiarist

plagiarizer and plagiarist both are nouns.

Word	Noun	Adjective	Verb	Adverb
plagiarizer	Yes	No	No	No
plagiarist	Yes	No	No	No

As nouns, plagiarizer and plagiarist are synonyms defined as:

plagiarizer and plagiarist: someone who uses another person's words or ideas as if they were his own

Other synonyms of plagiarizer include literary pirate, pirate, plagiariser.

plagiarizer (noun)	plagiarist (noun)
someone who uses another person's words or ideas as if they were his own	someone who uses another person's words or ideas as if they were his own