unpremeditated vs impulsive

unpremeditated and impulsive both are adjectives.

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

unpremeditated (adjective)	impulsive (adjective)
not premeditated	determined by chance or impulse or whim rather than by necessity or reason
not prepared or planned in advance	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