emergency vs emergent

emergency is a noun but emergent is not a noun.

Word	Noun	Adjective	Verb	Adverb
emergency	Yes	No	No	No
emergent	No	Yes	No	No

emergency (noun)	emergent (noun)
a brake operated by hand; usually operates by mechanical linkage
a sudden unforeseen crisis (usually involving danger) that requires immediate action
a state in which martial law applies

emergency (adjective)	emergent (adjective)
	coming into existence
	occurring unexpectedly and requiring urgent action