crucial vs decisive

crucial and decisive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
crucial	No	Yes	No	No
decisive	No	Yes	No	No

crucial (adjective)	decisive (adjective)
of extreme importance; vital to the resolution of a crisis	determining or having the power to determine an outcome
of the greatest importance	characterized by decision and firmness
having crucial relevance	forming or having the nature of a turning point or crisis
	unmistakable