Synonyms for Pestiferous:

adj.

annoying (adjective)
toxic, unhealthy, bothersome.

n.

pestiferous (noun)
disagreeable, plaguey, plaguy, vexatious, irritating, bothersome, teasing, galling, nettlesome, vexing, annoying, pesky, pestering.
virulent (noun)
toxic, unhealthy.

Other synonyms:

Other relevant words:
toxic, unhealthy.

Usage examples for pestiferous

  1. You will either go to the hospital- for we can't have pestiferous fellows like you here- or start for Lyons in an hour. – The Memoires of Casanova, Complete The Rare Unabridged London Edition Of 1894, plus An Unpublished Chapter of History, By Arthur Symons by Jacques Casanova de Seingalt
  2. There is an end of his pestiferous logic. – The Religious Life of London by J. Ewing Ritchie
  3. At that time the future Babylonia was a pestiferous marsh, inundated by the unchecked overflow of the rivers which flowed through it. – Early Israel and the Surrounding Nations by Archibald Sayce