pestilent

(s) exceedingly harmful baneful, pernicious, deadly,
(s) likely to spread and cause an epidemic disease
- "a pestilential malignancy in the air"- Jonathan Swift
- plaguey fevers
pestilential, plaguey, pestiferous,

Synonyms

baneful pernicious deadly pestilential plaguey pestiferous

Words of close approximity

pestilential