lethal, deadly, venomous; see poisonous.
"viperous." YourDictionary, n.d. Web. 16 October 2018. <http://thesaurus.yourdictionary.com/Viperous>.
viperous. (n.d.). Retrieved October 16th, 2018, from http://thesaurus.yourdictionary.com/Viperous
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