shells

ammunition consisting of a cylindrical metal casing containing an explosive charge and a projectile; fired from a large gun
the material that forms the hard outer covering of many animals
hard outer covering or case of certain organisms such as arthropods and turtles
the hard usually fibrous outer layer of some fruits especially nuts
the exterior covering of a bird's egg
a rigid covering that envelops an object;
a very light narrow racing boat
the housing or outer covering of something;
a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners)
the hard largely calcareous covering of a mollusc or a brachiopod
use explosives on;
create by using explosives;
fall out of the pod or husk;
hit the pitches of hard and regularly;
look for and collect shells by the seashore
come out better in a competition, race, or conflict;
remove from its shell or outer covering;
remove the husks from;

shells is a valid Scrabble (US) TWL word

shells is a valid Scrabble Word in Merriam-Webster MW Dictionary

shells is a valid Scrabble Word in International Collins CSW Dictionary

shells is a valid Words With Friends word