momentous (adj.)

• absolute
• ascendant
• authoritarian
• authoritative
• authorized
• autocratic
• big
• bustling
• charged
• charismatic
• charming
• commanding
• competent
• consequential
• considerable
• controlling
• critical
• crucial
• decisive
• dominant
• double-barreled
• earthshaking
• effective
• effectual
• efficacious
• eminent
• empowered
• enchanting
• epochal
• estimable
• eventful
• fraught
• governing
• grand
• grave
• great
• high-powered
• imperative
• important
• influential
• laden
• leading
• magnetic
• major
• material
• meaningful
• mighty
• official
• personable
• persuasive
• phenomenal
• pivotal
• portentous
• potent
• powerful
• preeminent
• prestigious
• prominent
• puissant
• ranking
• reputable
• ruling
• self-important
• senior
• serious
• significant
• stirring
• strong
• suasive
• substantial
• superior
• supreme
• telling
• totalitarian
• vital
• weighty
• winning
• world-shaking