impulsive vs unprompted

impulsive and unprompted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
impulsive	No	Yes	No	No
unprompted	No	Yes	No	No

As adjectives, impulsive and unprompted are synonyms defined as:

impulsive and unprompted: proceeding from natural feeling or impulse without external stimulus

impulsive (adjective)	unprompted (adjective)
determined by chance or impulse or whim rather than by necessity or reason	proceeding from natural feeling or impulse without external stimulus
having the power of driving or impelling
characterized by undue haste and lack of thought or deliberation
proceeding from natural feeling or impulse without external stimulus
without forethought