wide
crack!
Glen is the word for a long, narrow valley. It traces its origin to 15th century Scottish Gaelic word Gleann.
slit
Well I'm not entirely sure but I think it's a small narrow cut.
A narrow opening refers to a small or restricted space through which something can pass. It typically implies a limited width or aperture that may require things to be squeezed or fitted carefully through it. Examples include a crack in a wall or a tight passageway between two objects.
3d. pers. sing. pres. of Slide., of Slit, To cut lengthwise; to cut into long pieces or strips; as, to slit iron bars into nail rods; to slit leather into straps., To cut or make a long fissure in or upon; as, to slit the ear or the nose., To cut; to sever; to divide., A long cut; a narrow opening; as, a slit in the ear.
slit
A narrow fissure is a long, narrow opening or crack in a surface, typically seen in rock formations or the Earth's crust. These fissures can be a result of geological processes such as tectonic movements or erosion.
A narrow gap or crack in a rock is commonly referred to as a fissure. This term describes a long, narrow opening in the rock where it has split or fractured. Fissures can vary in size and depth.
Ria is a long narrow inlet.
A fissure is an opening or crack in the Earth's crust, typically where tectonic plates meet. It is not a projection or depression, but rather a narrow, long fracture in the ground.
The 4 letter word for long for is want.