1
general::
very loud
thunderous
extremely loud and deep in sound:
• His remarks received thunderous applause from the audience.
deafening
so loud that you cannot hear anything else:
• The noise was deafening – like a thousand fireworks going off at one time. • People living near airports suffer the deafening sound of aircraft taking off and landing.
ear-splitting
so loud that your ears feel uncomfortable:
• He played the music at ear-splitting volume.
piercing
extremely loud, high, and unpleasant to hear:
• a piercing scream
Longman-Thesaurus