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

See also: epidemic, noxious, pestilence

• European Recovery Program
• European red elder
• European roller
• European Russia
• European sandpiper
• European sanicle
• European sea bream
• European sea eagle
• European shrike
• European silver fir
• European smelt
• European sole
• European spider crab
• European swift
• European toad
• European tortoise
• European turkey oak
• European Union
• European water ouzel
• European water shrew
• European white birch
• European white lily
• European wildcat
• European wolf spider
• European wood mouse