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

See also: loud, stormy, thunder

• slippered
• slipperiness
• slipperwort
• slippery
• slippery dick
• slippery elm
• slippery slope
• slipping
• slippy
• slipshod
• slipskin grape
• slipstick
• slipstream
• slipway
• slit
• slit lamp
• slit trench
• slither
• slithering
• slithery
• sliver
• slivery
• slivovitz
• Slo-Bid
• Sloane Ranger