An impulsive, seemingly unmotivated action, change of mind, or notion.
A capriccio.
A brief romance.
An unpredictable or sudden condition, change, or series of changes.
A disposition to be impulsive.
An action as opposed to a trait or thing.
A named command that performs a specific operation on an object.
A word that indicates an action, event, or state of being.
To perform any action that is normally expressed by a verb.
To use any word that is or was not a verb (especially a noun) as if it were a verb.