What's the difference between Reunion and Reunite?

Reunion is more like a social gathering where lots of people are coming together from being seperated.

reunited is usually the term used for a smaller group/amount of people that have also een seperated for a long period of time.

Reunite is a synonym of reunion. Reunion is a related term of reunite. As a noun reunion is the process or act of reuniting. As a verb reunite is to unite again.