Synonyms for Spontaneously

Synonyms starting with letter I

• impromptu

  instinctively, voluntarily
• impulsively

  without being asked, instinctively, voluntarily
• instinctively

  without thinking, automatically, voluntarily
• involuntarily

  without thinking, automatically
• immediately

  instinctively
• intentionally
• informally
• intuitively
• innately
• in a natural manner
• in a natural way
• instantaneously
• in a flash
• instanter
• instantly
• improvised
• impulsive
• innocently
• impetuously
• in the heat of the moment

  voluntarily
• independently
• instinctually
• improv
• imprudently
• irresponsibly
• inherently
• inattentively
• importantly
• in effect
• in essence