1) HOLD > meeting / election / conversation
eg
Could we hold a meeting to discuss this tomorrow afternoon?
They will hold a meeting to discuss this problem tomorrow.
The election will be held on 8th of August.
I find it's almost impossible to hold a sensible conversation with her.
2) ORGANIZE > activity / event
eg
They organized a meeting between the teachers and students.
We'll organize an oratorical contest.
They organized the truckers into a union.
3) CONDUCT > activity (eg. survey, experiment)
eg
We are conducting a survey to find out what our customers think of their local bus service.
The experiments were conducted by scientists in New York.
How you choose to conduct your private life is your own business!
4) STAGE > permance of a show or play / event
eg
The local drama group is staging a production of the musical 'Grease'.
The production is a modern staging of the fairy tale 'Cinderella'.
The city was staging Hamlet.
Barcelona staged the Olympic Games in 1992.
They decided to stage a general strike.