a stream of water flowing with great rapidity and violence.

a rushing, violent, or abundant and unceasing stream of anything

a torrent of lava.

a violent downpour of rain.

a violent, tumultuous, or overwhelming flow

a torrent of abuse.

torrential.

noun

drip

noun

cascade , cataclysm , cataract , cloudburst , deluge , downpour , effusion , flood , flooding , flux , gush , inundation , niagara , outburst , overflow , pour , rush , shower , spate , stream , tide , waterfall , alluvion , freshet , burst , channel , current , flow , outpouring , turbulent