As nouns the difference between torrent and tsunami
is that
torrent is a violent flow, as of water, lava, etc.; a stream suddenly raised and running rapidly, as down a precipice while
tsunami is a very large and destructive wave, generally caused by a tremendous disturbance in the ocean, such as an undersea earthquake or volcanic eruption.
As an adjective torrent
is rolling or rushing in a rapid stream.
As a verb torrent
is to download in a torrent.