plagiariser

/ˈpleɪdʒəˌraɪzər/
noun
  1. A person who copies someone else's work, ideas, or words and presents them as their own.
    • The university expelled the plagiariser for submitting a stolen essay.
    • As a journalist, she was fired for being a plagiariser.
    • The teacher caught the plagiariser copying paragraphs from a website.
Antonyms