First, you have to be familiar with fighting. If you're not, you need to research whatever sort of combat your people will be doing!
Keep your sentences short and exciting -- short sentences move the action along quickly.
Use all of the senses -- describe what the character sees, smells, hears, feels, and tastes. Especially include emotions.
a fight
fight
conflict
a fight
Duel
Rapport is the medical term used to describe a relationship of understanding between two people.
That form of combat is called "Jousting"
combat is another term for skirmish's between two or more hostile forces.
Combat between two airplanes.
A bond between two people can be described as a strong connection, a deep attachment, or a close relationship. It can also be characterized as a shared understanding or an unbreakable tie.
two people or more in a fight ie. combat
Personal space is described as the distance between two people that a person feels comfortable.