Crater and Depth

Crater noun - A bowl-shaped geological formation at the top of a volcano.

Depth and crater are semantically related in nature topic. In some cases you can use "Depth" instead a noun "Crater", when it comes to topics like valley.

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

Crater and depth are semantically related in nature topic. Sometimes you can use "Crater" instead a noun "Depth", if it concerns topics such as valley.