Synonyms:
* Impromptu: This emphasizes the spontaneous nature of the speech or action.
* Unscripted: This emphasizes that there is no pre-written plan or script.
* Off-the-cuff: This is a more informal synonym, implying a casual and unrehearsed approach.
* Spontaneous: This emphasizes the unplanned and natural quality of the action.
* Improvised: This emphasizes the use of whatever resources are available in the moment.
Antonyms:
* Rehearsed: This implies that the action has been practiced beforehand.
* Planned: This emphasizes that the action was carefully considered and prepared for.
* Scripted: This emphasizes that the action was written down beforehand.
* Prepared: This emphasizes that the action was taken after careful planning and consideration.
* Formal: This emphasizes that the action was done in a structured and planned way.