A Parapet
The battlement can be used in general reference to a location possibly during a battle or siege. Another more elegant and synonymous name describing a sawtooth shaped parapet is crenelation. The crenelation is made up of merlons(the high part protecting shooters) and crenels (the low part exposing shooters)
A crenelation is usually found protecting an allure (wall walk) on the outer wall.
The type of castle that has two walls around it is called a concentric castle. ferocious
stone walls around a castle are called curtain walls. they are built for defence.
The rampart around the top part of a castle is called a parapet. It is a low wall or barrier that provides protection for defenders and often features crenellations for firing weapons. Parapets are integral to the castle's defensive architecture, allowing for visibility while shielding those atop the walls.
The machine used to break down castle walls and gates was called a battering ram. They also used catapults to break down the walls.
There are guards and a few knights on top of a castle. They shoot down arrows and throw down spears to defend the keep. That is whats on the castle walls. :D
The weak point of the castle is the entrance or the top of the walls. Often, a castle was attacked from the inside, using a traitor. A castle might also be attacked by cutting off supplies.
spires
teeth Or Battlements.
Battlements? You may need to be more specific, there are kind of a lot of things on castle walls...
the splendor falls on castle walls and snowy summits in old story; ....Its "the Splendor Falls On Castle Walls" by Alfred, Lord Tennyson
The walls of the castle are 18ft thick. So arrows can't break through the castle. I got this answer from http://www.pennyparker2.com/blarney.html. But its very scary walking round the top as the building is very high and all the inside has collapsed.
100 walls