Cleft and Rima

Cleft noun - An irregular usually narrow break in a surface created by pressure.

Rima and cleft are semantically related in break topic. In some cases you can use "Rima" instead a noun "Cleft".

Rima noun - A narrow elongated opening or fissure between two symmetrical parts.

Cleft and rima are semantically related in break topic. Sometimes you can use "Cleft" instead a noun "Rima", if it concerns topics such as opening.