Fjord
A fjord.
By definition, a narrow chasm with steep cliff walls is a canyon. Exceptionally narrow canyons are called "slot canyons".
Fjords. (Sometimes spelled as Fiords. )
One example are the Western Norway Fjords.
This is called a cliff, which is a vertical or near-vertical rock exposure. Cliffs often form at the edge of a plateau due to erosion or tectonic activity, creating dramatic and sometimes dangerous landscapes.
An inlet of sea with a steep bank is likely a fjord, which is a narrow, deep inlet of the sea bordered by steep cliffs or hills. Fjords are typically formed by glacial activity and are common in regions with significant glacial history, such as Norway, Iceland, and Alaska.
Deep inlets out by the sea into the Scottish coast are called sea lochs. They are typically long, narrow bodies of water that are surrounded by steep cliffs or mountains.
another name for a steep cliff is mountainand ESCARPMENT
Steep ocean inlets, often referred to as fjords, are narrow, deep coastal valleys formed by glacial activity, characterized by steep cliffs on either side. These inlets typically have a U-shaped profile and can be quite deep, with water levels often exceeding the surrounding land. The dramatic topography creates stunning landscapes, where freshwater rivers meet the ocean, and they are often rich in marine biodiversity. Fjords can serve as important habitats for various species and are popular destinations for tourism and recreation.
A steep cliff about 100 stories high is commonly referred to as a "sheer cliff" or a "precipice."
A plateau is an elevated section of land bordered all around (or mostly so) by steep drop offs. The cliffs are steep. There are lots of pictures on the web, and you'll find a link to just one of them below.
Fjord. An Fjord is a body of water open to the sea which is bordered on both sides by land, usually with steep cliffs, but not always.