Um....
The first ten amendments to the Constitution are the “Bill of Rights,” remember from grade school?
Unlike numbers 11 onward, the first 10 were not afterthoughts, they “in the works” from the start, but required a bit more hammering out.
I noticed that in your rush to make such a snarky comment, a-hole, that you didn't answer my question. No matter what you call them, they are still AMENDMENTS to the Constitution, without which - as it turns out - the original Constitution would not have been ratified.
I found further research on my own - the ability to do so having resulted from a grade school, middle school, high school, and partial college education - here:
http://usinfo.state.gov/products/pubs/rightsof/speech.htm
So you can take your comment and shove it up your back passage.