Waves are the raised swells of water that move along the surface of the ocean. At the beach, surfers ride on the waves:

The size of the waves depends on the general movement of the ocean water in the area, the shape of the sea floor, and whether there are storms or strong winds that can produce bigger waves.

The word tide refers to the variation in the general level of the ocean. Tides are caused by the gravitational forces of the moon and sun, as well as the rotation of the earth. Many places have one or two times of high tide and low tide per day:

Mythic Creatures That Never Existed But People Believed In Anyway

Ghoul

The ghoul is one of the most well known creatures in Arabian folklore and we were introduced to it in the collection of tales, One Thousand and One Nights. The ghoul is described as an undead monster that can also take the form of an immaterial spirit and usually goes into graveyards to eat the flesh of the recently dead. This is probably the main reason why the word ghoul is associated in Arabic countries with anything macabre and they often use the word when referring to a gravedigger or any profession directly related to death.