Puppet
A wooded hollow is called a dell. A dell is usually a small, secluded valley that is usually in a forest.
marionette is a jointed puppet manipulated from above by strings or wires attached to its limbs while a puppet is a small figure of a person or animal, having a cloth body and hollow head, designed to be fitted over and manipulated by the hand.
A hollow guitar is called an Acoustic guitar.
The hollow part of a bird is called the airsac.
A hollow sphere.
cone that is my answer
An hourglass
a hollow cat figure made by humans
the proboscis. its actually its tongue...yes its hollow
cave
Hollow rivets are assembled on a pin often called a mandrel. The mandrel is used to insert the hollow rivet into the workpiece before the ends are secured and the mandrel is removed.
I can give you several sentences.That statue is hollow, not solid gold.It was a hollow victory because we still lost the war.A canyon is sometimes called a hollow.