All extemporisation synonyms

noun extemporisation

• improvisation — the art or act of improvising, or of composing, uttering, executing, or arranging anything without previous preparation: Musical improvisation involves imagination and creativity.
• ad-lib — If you ad-lib something in a play or a speech, you say something which has not been planned or written beforehand.
• impromptu — made or done without previous preparation: an impromptu address to the unexpected crowds.
• spontaneity — the state, quality, or fact of being spontaneous.