As nouns the difference between tsunami and whirlwind
is that tsunami is while whirlwind is a violent windstorm of limited extent, as the tornado, characterized by an inward spiral motion of the air with an upward current in the center; a vortex of air it usually has a rapid progressive motion.
As an adjective whirlwind is
rapid and minimal: a whirlwind tour'', ''a whirlwind guide .