prowl + -er
prowler (plural prowlers)
- One who roves about for prey; one who prowls.
1922, Michael Arlen, “1/1/2”, in “Piracy”: A Romantic Chronicle of These Days:
- House Prees and Bloods […] were everywhere to be seen in earnest colloquy. For the matter was, that there was some sort of night-prowler about the school grounds.