other ways to say "very important"

vital

absolutely necessary or important; essential. secrecy is of vital importance. synonymes: essential, of the essence, critical, crucial, key, indispensable, integral,

essential

absolutely necessary; extremely important. it is essential to keep up-to-date records synonymes: crucial, necessary, key, vital, indispensable, important, all-important, of the essence, critical, imperative, mandatory, compulsory, obligatory, urgent, pressing, paramount, preeminent, high-priority, non negotiable, must-have (of a disease) with no known external stimulus or cause; idiopathic. essential hypertension

fundamental

forming a necessary base or core; of central importance. the protection of fundamental human rights synonymes: basic, underlying, core, foundational, rudimentary, elemental, elementary, basal, root.

paramount

more important than anything else; supreme.

critical

of the ​greatest ​importance to the way things might ​happen: The president's ​support is critical (to this ​project). a critical ​decision

imperative

of vital importance; crucial. immediate action was imperative synonymes: vitally important, of vital importance, all-important, vital, crucial, critical, essential, nece

at the end of the day

used for saying what you consider is the most important thing about a situation after thinking about it