All extemporaneous antonyms

adjective extemporaneous

• deliberate — If you do something that is deliberate, you planned or decided to do it beforehand, and so it happens on purpose rather than by chance.
• planned — arranged, organized, or done in accordance with a plan: a planned attack.
• premeditated — done deliberately; planned in advance: a premeditated murder.
• prepared — properly expectant, organized, or equipped; ready: prepared for a hurricane.