Are The United States a Democracy?
The United States is a Republic and not a Democracy! The word democracy is never mentioned in the Constitution. You are right! Republic and Democracy are titles of two different perspectives.
A Republic is the contrary to a Monarchy which is ruled by a family from generation to generation. A Republic is the contrary to a dictatorship or an oligarchy, as well. The power of monarchy, dictatorship, and oligarchy is based on one person, or a family and they like to reign from generation to generation.
A Republic is ruled by its own people, their citizens. A Republic has characteristics to be fulfilled. To rule a republic, you need rules, and these rules are named democratic.