1. Loud enough to cause (temporary) hearing loss
   - deafening, earsplitting, thunderous 
2. Accompanied with thunder

See also: loud, stormy, thunder

• environmental condition
• Environmental Protection Agency
• environmental science
• environmentalism
• environmentalist
• environmentally
• environmentally-friendly
• environs
• envisage
• envision
• envisioned
• envisioning
• envoi
• envoy
• envoy extraordinary
• envy
• enwrap
• enwrapped
• Enzed
• enzootic
• enzymatic
• enzyme
• enzyme-linked-immunosorbent serologic assay
• enzymic
• enzymologist