outvenom

From out- +‎ venom.

outvenom (third-person singular simple present outvenoms, present participle outvenoming, simple past and past participle outvenomed)

1. (transitive) To exceed in venom.
   • 1611 April (first recorded performance), William Shakespeare, “The Tragedie of Cymbeline”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act III, scene iv]:

     'Tis slander,
     Whose edge is sharper than the sword, whose tongue
     Outvenoms all the worms of Nile.