Depth and Gulf

Depth noun - Distance measured from the top to the bottom of something.

Gulf is a synonym for depth in high topic. In some cases you can use "Gulf" instead a noun "Depth", when it comes to topics like nature, abyss, valley.

Gulf noun - A part of a body of water that extends beyond the general shoreline.

Depth is a synonym for gulf in high topic. You can use "Depth" instead a noun "Gulf", if it concerns topics such as deep, abyss, valley.