all important vs of the essence

all important and of the essence both are adjectives.

Word	Noun	Adjective	Verb	Adverb
all important	No	Yes	No	No
of the essence	No	Yes	No	No

As adjectives, all important and of the essence are synonyms defined as:

Other synonyms of all important include all-important, crucial, essential.

all important (adjective)	of the essence (adjective)
of the greatest importance	of the greatest importance