essential - English Synonyms Dictionary

essential

n.
[1] necessity , requirement , requisite , necessary
adj.
[1] indispensable , necessary , requisite , required , important , imperative , vital , material , quintessential
[2] fundamental , indispensable , basic , intrinsic , elemental , elementary , principal , primary , key , main , leading , chief
[3] all-important , all important , crucial , of the essence
[4] substantive