Clod and Peat moss

Clod noun - A big clumsy often slow-witted person.

Peat moss and clod are semantically related In some cases you can use "Peat moss" instead a noun "Clod".

Peat moss noun - Any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat.

Clod and peat moss are semantically related in ground topic. Sometimes you can use "Clod" instead a noun phrase "Peat moss".