The rights protected by the Constitution is called the Bill of Rights. This is a few more than two words, but it fits the criteria for having eleven letters.
Adding to or changing the Constitution It is called "amending" it. There are currently 27 ratified amendments to the US Constitution.
constitution
The preamble to the constitution.
In the United States, a change in the US Constitution is called an amendment. The Constitution itself describes what must be done to make a change in that governing document. Other nations with a constitution also have their own ways of changing their own constitution.
Constitutionalists
The rights protected by the Constitution is called the Bill of Rights. This is a few more than two words, but it fits the criteria for having eleven letters.
The Screwtape Letters is a novel written by C. S. Lewis that is so named because it is a collection of fictitious letters written by a powerful demon to his nephew.
Article X of the Alabama constitution is called Exemptions. It has seven sections that list property exempt from sale for debt collection.
Federalist Papers
A place defended by a wall is called a building. If it's a really strong wall, it might be called a fortification (or a fort, for short).
The UK does not have a single, written document that they call their constitution. Instead, they have something called an 'uncodified constitution': a collection of customs, statutes, precedents, etc. that together form the fundamental rules of government.
wagon fort
At collection of stamps is refered to as a stamp collection. They are frequently kept in albums. Philately is the name for the study and collection of stamps.
a collection of fish is called a school of fish
it is called a range of mountains
The UK does not have a single, written document that they call their constitution. Instead, they have something called an 'uncodified constitution': a collection of customs, statutes, precedents, etc. that together form the fundamental rules of government.