That is probably a 'mallet'.
An actual hammer may have a metal handle and/or head, but a mallet always has a non-metallic head which is, historically, wooden.
a hammer
A Stone
A pointed wooden stick that driven into the ground is a machine that have a pointed wooden thing that can driven into the ground it is a machine.
a "Flat circle thing that's flat" ;)
The wooden pad under a gavel is called the "Sound Block" or the "Base" of the gavel.
A wooden thing called an oar.But there are also paddles made from other materials.
I think you are referring to the Colosseum. It was shaped as an ellipse, and was also known as the Flavian Amphitheatre.
Brass Knuckles
It is called a Delta.
they used diffrent kinds of equipment like axes, hammer, wooden plates, and more thing
No, hammer is a common noun, any hammer. A proper noun is the name of a specific person, place, thing, or a title such as MC Hammer or Hammer SD.
its called an egg, the only thing that's changed is the shape of you egg shaped head you strange person