important

I (urgent) adjective acute, called for, clamant, clamorous, cogent, compelling, critical, crucial, crying, demanding attention, driving, essential, exigent, high-priority, impelling, imperative, importunate, in demand, indispensable, inescapable, instant, necessary, necessitous, needed, prerequisite, pressing, requested, required, requisite, unavoidable, vital, wanted II (significant) adjective big, capital, chief, commanding, consequential, considerable, crucial, dignified, distinguished, esteemed, famous, far-reaching, first, foremost, formidable, grand, grave, gravis, high-level, illustrious, imposing, impressive, influential, leading, magnus, main, majestic, major, marked, material, mattering much, memorable, mighty, momentous, notable, noteworthy, of great consequence, of great magnitude, of great weight, of high standing, of high station, of importance, outstanding, overshadowing, paramount, portentous, powerful, preeminent, primary, prime, principal, prominent, relevant, remarkable, salient, serious, signal, solemn, substantial, superior, supreme, valuable, weighty, well-known III index consequential (substantial), considerable, constructive (creative), critical (crucial), crucial, decisive, determinative, essential (required), exigent, famous, germane, illustrious, indispensable, influential, key, major, momentous, necessary (required), notable, noteworthy, outstanding (prominent), peremptory (imperative), potent, powerful, predominant, primary, prime (most valuable), prominent, relevant, remarkable, renowned, requisite, salient, serious (grave), special, strategic, substantial, substantive, unusual, urgent, valuable, vital