impulsive 9 Associations

unprompted spontaneous (similar term) self-generated (similar term)

instinctive 11 Associations

natural spontaneous (similar term) self-generated (similar term)

intuitive 9 Associations

spontaneous (similar term) self-generated (similar term)

natural 7 Associations

instinctive spontaneous (similar term) self-generated (similar term)

unprompted 10 Associations

impulsive spontaneous (similar term) self-generated (similar term)

unscripted 10 Associations

ad-lib (similar term) spontaneous (similar term) unwritten (similar term) scripted (antonym)