Plagiariser and Stealer

Plagiariser noun - Someone who uses another person's words or ideas as if they were his own.

Stealer and plagiariser are semantically related. In some cases you can use "Stealer" instead a noun "Plagiariser".

Stealer noun - One who steals.

Plagiariser and stealer are semantically related. Sometimes you can replace term "Plagiariser" with "Stealer", this nouns are similar.