critical vs life-threatening

critical and life-threatening both are adjectives.

Word	Noun	Adjective	Verb	Adverb
critical	No	Yes	No	No
life-threatening	No	Yes	No	No

critical (adjective)	life-threatening (adjective)
marked by a tendency to find and call attention to errors and flaws	causing fear or anxiety by threatening great harm
characterized by careful evaluation and judgment
being in or verging on a state of crisis or emergency
at or of a point at which a property or phenomenon suffers an abrupt change especially having enough mass to sustain a chain reaction
of or involving or characteristic of critics or criticism
forming or having the nature of a turning point or crisis
urgently needed; absolutely necessary