salvo

broadside, earful

avalanche, burst, cataclysm, cataract, deluge, discharge, engulfment, flood, flood tide, flush, gush, inundation, outburst, outflow, outpouring, overflow, rash, spate, surge, torrent

current, river, stream, tide

excess, glut, overabundance, overage, overkill, overmuch, oversupply, superabundance, superfluity, surfeit, surplus