important vs all important

important and all important both are adjectives.

Word	Noun	Adjective	Verb	Adverb
important	No	Yes	No	No
all important	No	Yes	No	No

important (adjective)	all important (adjective)
of great significance or value	of the greatest importance
of extreme importance; vital to the resolution of a crisis
important in effect or meaning
having or suggesting a consciousness of high position
having authority or ascendancy or influence