Tortoiseshell and Tortoise

Tortoiseshell noun - The mottled horny substance of the shell of some turtles.

Tortoise and tortoiseshell are semantically related. In some cases you can use "Tortoise" instead a noun "Tortoiseshell".

Tortoise noun - Usually herbivorous land turtles having clawed elephant-like limbs; worldwide in arid area except Australia and Antarctica.

Tortoiseshell and tortoise are semantically related. You can use "Tortoiseshell" instead a noun "Tortoise".