How do I set one condition for multiple collide?

My game can spawn multiple kind of monsters, but they are all one points when hit. Can I combine all of them into one Event? Eg. When bullet collides with Monster1, Monster2, Monster3, etc, they are all destroyed.

Yes this is what 'Families' are used for. Create a family and add all monster objects into it, then you can say when bullet collides with 'Family' - destroy 'Family'