What are other words that can be used to express the open modifier in Swift?

Answer:

• public (with the possibility of inheritance and overriding within the module, but not outside it).

The open modifier is broader than public because it allows inheritance and overriding from any module, not just the one where the type is declared. The public modifier restricts this capability to the declaring module only. There are no direct analogs to open in Swift; its functionality is unique.