trooper / trouper
A soldier or state police officer versus a member of a troupe, or a stout performer.
A trooper is a soldier or a state police officer. A trouper is a member of a theatrical troupe, or a person who carries on without fuss. Write real trouper for the stout performer, not real trooper, unless you mean the officer.
Examples
UseA state trooper stopped the truck.
UseShe was a trouper through the delay.
AvoidShe was a real trooper through the delay.