importance

As nouns the difference between importance and importantness

is that importance is the quality or condition of being important or worthy of note while importantness is the quality of being important; importance.

As nouns the difference between importance and concernment

is that importance is the quality or condition of being important or worthy of note while concernment is (obsolete) the state or quality of being a concern.

As nouns the difference between importance and tapinosis

is that importance is the quality or condition of being important or worthy of note while tapinosis is (rhetoric) a figure of speech whereby something is given less importance by the name given it than it merits.

As nouns the difference between importance and inconsequentia

is that importance is the quality or condition of being important or worthy of note while inconsequentia is trivia; items or facts of little or no importance.

As nouns the difference between importance and supermajor

is that importance is the quality or condition of being important or worthy of note while supermajor is any of the world's largest few privately-owned oil and gas companies.

As an adjective supermajor is

very major; of great significance or importance.