Cuticle and Pallium

Cuticle noun - Hard outer covering or case of certain organisms such as arthropods and turtles.

Pallium and cuticle are semantically related. In some cases you can replace term "Pallium" with "Cuticle", this nouns are similar.

Pallium noun - (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell.

Cuticle and pallium are semantically related. Sometimes you can use "Cuticle" instead a noun "Pallium".