list of synonyms of word impulsive

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

• unpremeditated (similar term)

• driving
• dynamic (similar term)
• dynamical (similar term)

• capricious
• whimsical
• arbitrary (similar term)

• hotheaded
• impetuous
• madcap
• tearaway
• brainish
• incautious (similar term)