1. Exceedingly harmful
   - baneful, deadly, pernicious 
2. Likely to spread and cause an epidemic disease
   - pestilential, pestiferous, plaguey

See also: epidemic, noxious, pestilence

• eupneic
• eupnoea
• eupnoeic
• Euproctis
• Euproctis chrysorrhoea
• Euproctis phaeorrhoea
• EUR
• Eurafrican
• Eurasia
• Eurasian
• Eurasian badger
• Eurasian green toad
• Eurasian hamster
• Eurasian kingfisher
• Eurasian otter
• Eurasian woodcock
• Eurasiatic
• eureka
• eurhythmics
• eurhythmy
• Euripides
• euro
• Eurobabble
• Eurocentric
• mass spectrograph