Range is how far that the attacks of a certain character can reach.
For more information about different units of length, please see this page.
Stamina, also known as Endurance or Staying Power, is an attribute that allows a certain character to remain active, exert itself to prolonged periods of time, and recover from ordeals.
To quote Wikipedia:
"Intelligence has been defined in many different ways such as in terms of one's capacity for logic, abstract thought, understanding, self-awareness, communication, learning, emotional knowledge, memory, planning, creativity and problem solving. It can also be more generally described as the ability to perceive information and retain it as knowledge for applying to itself or other instances of knowledge or information, thereby creating referable understanding models of any size, density, or complexity, due to any conscious or subconscious imposed will or instruction to do so."