important

Synonyms: big big-league chief considerable conspicuous critical crucial decisive determining earnest essential esteemed exceptional exigent extensive far-reaching foremost front-page grave great heavy imperative importunate influential large marked material mattering much meaningful momentous necessary of moment of note of substance paramount ponderous pressing primary principal relevant salient serious signal significant something standout urgent vital weighty

Antonyms: inappreciable insignificant little nonessential small trivial unimportant unsubstantial

Synonyms: aristocratic big-time distinctive distinguished effective esteemed extraordinary famous first-class foremost four-star front-page grand heavy high-level high profile high-ranking high-up honored illustrious imposing incomparable leading majestic major-league noble notable noted noteworthy of note page-one potent powerful preeminent prominent remarkable seminal signal solid superior talented top-drawer top-notch upper-class vip well-known

Antonyms: insignificant powerless unimportant unknown worthless