What's the difference between a so-called, tidal wave, and a tsunami?

Question

Although tidal wave is a misnomer I've heard that massive waves caused by landslips or volcanic activity have a different mechanism to tsunamis.

Answer 1

Lots of people call tsunamis tidal waves. After seeing pictures of the recent tsunami in south Asia, I can see why. They really do look more like a giant high tide than a giant high wave.

Answer 2

Tsunami, Japanese word, meaning “harbor wave” and used as the scientific term for seismic sea wave generated by an undersea earthquake or possibly an undersea landslide or volcanic eruption. When the ocean floor is tilted or offset during an earthquake, a set of waves is created similar to the concentric waves generated by an object dropped into the water.

And

Tidez are a result from the gravitational attraction of the moon and the sun upon the water and upon the earth itself.

Answer 3

Tsunamis are caused by a large and sudden displacement of water. Tidal waves are actually waves caused by the moon's gravitational pull, and are normal.

Answer 4

no difference, 'cept they have nothing to do with tides, so "tidal wave" could be considered confusing.