In the Harry Potter book series, what is the name of the sword that can destroy Horcruxes?

In the Harry Potter book series, the sword that can destroy Horcruxes is the Sword of Gryffindor.

The sword was made for Godric Gryffindor by goblins and possesses a special property: it absorbs substances that strengthen it. After Harry uses it to kill the basilisk in the Chamber of Secrets, the sword absorbs basilisk venom. That venom gives it the power to destroy Horcruxes.

Harry uses the sword to destroy several Horcruxes, while Ron and Neville also use it during the final struggle against Voldemort. Its ability is not simply a result of being an old or powerful weapon; the basilisk venom absorbed into the blade is crucial.

The sword can appear when a true Gryffindor needs it, provided it is summoned from the Sorting Hat. It should not be confused with any weapon belonging to the other Hogwarts founders.