Locksmithery

[Julian]

noun. The subject of locksmiths, not to be confused with [locksmithing], which is what they actually do. [Locksmithing] is the broad subject.
Its like comparing [horticulture] with gardening. [Horticulture] is the subject, gardening is the action.

[Rihanna]

The work or trade of a locksmith; = locksmithing.