crucial

• "vital to the resolution of a crisis"
• "a crucial moment in his career"
• "a crucial election"
• "a crucial issue for women"

Synonyms

• importantof great significance or value; important in effect or meaning; of extreme importance; having authority or ascendancy or influence; having or suggesting a consciousness of high position

• "crucial to the case"
• "relevant testimony"

• "the all-important subject of disarmament"
• "crucial information"
• "in chess cool nerves are of the essence"

Synonyms

• all-important(a)
• all important(p)
• essentialanything indispensable; absolutely necessary; basic and fundamental; of the greatest importance; being or relating to or containing the essence of a plant etc; defining rights and duties as opposed to giving the rules by which rights and duties are established
• of the essence(p)