A water spout is technically a non-supercell tornado over water... and while it's usually weaker than its land-brother the tornado, stronger ones are possible.
Usually found in the tropics, they've been known to form over lakes as well. There are generally three types: non-tornadic, tornadic and snowspout. The first, non-tornadic (or fair weather waterspouts) are the most common and tend to live only about 20 minutes. A tornadic spout is much stronger, and basically an actual tornado over water. These, like tornados, are connected with severe thunderstorms. Finally, the snowspout (also known as a snow devil) is the rarest of the three types.
Only six known pictures exist (four from Ontario, CA), and they require extremely cold temps over a body of warm water with a difference of a specific 34 degrees to form at all.
Rogue waves (also known as freak waves, monster waves, killer waves, extreme waves, and abnormal waves) are large and dangerous surface waves that occur far out to sea. These are not tsunamis, but instead seem to form from a variety of possible causes.
There are three types of rogue waves, the "Wall of Water", the "Three Sisters" and single, giant storm waves that can collapse within moments of their formation. These waves seem to occur in deep water or where a number of physical factors converge and can cause a number of waves to join together.
@CrystalMarker - you are a good soul I give you potato chips purple ones
Those two are super freaky. Incidentally, I had some images of Rogue waves, one was from the top a ship so image if the wave is flowing next to it how high it could be. The second one is taken by someone from an Airplane wondering what he saw, however, if a wave could be spotted flying high in the air, it is a GIGANTIC wave.
A 24-meter rogue wave photographed in 1980 in South Africa