Tsunami is not freaque wave because it is generally expectable, but it can be much more devastating. Yesterday's staggering 9.0 Richter scale earthquake in northeast Japan killed over 1300 people and sent catastrophic 33 foot tsunami hurtling across Pacific Ocean according to this DailyMail report.
Here's an AP picture showing the vortex of a whirlpool formed by tsunami waves at a port in Oarai, in the state of Ibaraki. Note that there is a small fishing boat caught in the mid of the whirlpool.
And here is the model output of the case:
Now here's the NOAA issued graphic of Tsunami wave heights as it travelled across the Pacific basin.
Our prayers are with all the devastated good people there, may God help them rebuilt their life in earnest blessing and for those lives lost may they all be rest in peace.