Icecap and Permafrost

Icecap noun - A mass of ice and snow that permanently covers a large area of land (e.g., the polar regions or a mountain peak).

Permafrost and icecap are semantically related. In some cases you can use "Permafrost" instead a noun "Icecap".

Permafrost noun - Ground that is permanently frozen.

Icecap and permafrost are semantically related. You can use "Icecap" instead a noun "Permafrost".