What is an antonym for scabbard?

There isn't a single perfect antonym for "scabbard" because it's a very specific term. However, depending on the context, some words that express the opposite idea could be:

* Sheath: This is the most general antonym, referring to any protective covering.

* Open: This implies the absence of a scabbard, where the weapon is exposed.

* Unsheathed: This specifically refers to the state of a weapon being removed from its scabbard.

* Drawn: This implies the weapon is not only unsheathed but ready for use.

The best antonym for "scabbard" will depend on the specific situation and what you want to convey.