avengeress

avenger +‎ -ess

avengeress (plural avengeresses)

1. (rare) A female avenger.
   • 1590, Edmund Spenser, The Faerie Qveene. […], London: Printed [by John Wolfe] for VVilliam Ponsonbie, OCLC 960102938, book III, canto VIII:

     That cruell Queene avengeresse

   • 2004, Brian P. Levack, The Witchcraft Sourcebook, page 323:

     Here you see the torch of Althaea, the avengeress; she was a good sister, but a bad mother.

• avengeress in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• The Century Dictionary, The Century Co., New York, 1914

• nerve gases