Synonyms of the word

unscripted

• adj. Not scripted; without a script.
• adj. (by extension) Unplanned, unexpected, spontaneous.

ad-lib

• v. To improvise all or part of a speech or other performance, especially in comedy.

spontaneous

• adj. Self-generated; happening without any apparent external cause.
• adj. Done by one's own free choice, or without planning.
• adj. proceeding from natural feeling or native tendency without external or conscious constraint.
• adj. arising from a momentary impulse.
• adj. controlled and directed internally; self-active; spontaneous movement characteristic of living things.
• adj. produced without being planted or without human labor; indigenous.
• adj. Random.
• adj. Sudden, without warning.

unwritten

• adj. Not written.
• adj. Oral or otherwise communicated without writing.
• adj. Implicit or understood but not formally articulated.
• adj. Containing no writing; blank.
• v. past participle of unwrite.