Synonyms and related words :
assumed, augured, called for, essential, foreshadowed, foreshown, foretokened, hinted, implicated, implied, indispensable, inferred, intimated, involved, irreducible, irreductible, irreplaceable, meant, necessary, needed, needful, predicted, prefigured, preindicated, prerequisite, presaged, presignified, presumed, presupposed, pretypified, prognosticated, promised, required, requisite, signified, suggested, supposed, threatened, unforgoable, vital, wanted