portentous
I
(eliciting amazement) adjective
amazing, astonishing, breathtaking, exceptional, extraordinary, great, inconceivable, incredible, indescribable, marvelous, memorable, miraculous, notable, noteworthy, novel, out of the ordinary, outstanding, phenomenal, prodigal, prodigious, rare, remarkable, shocking, singular, staggering, startling, stirring, striking, stupendous, superb, superlative, surprising, tremendous, uncustomary, unexampled, unheard of, unique, unparalleled, unprecedented, unusual, wonderful, wondrous
II
(ominous) adjective
alarming, augural, augurous, baleful, black, bodeful, boding, cautionary, dark, dire, direful, divinatory, doomful, dread, dreadful, dreary, fateful, fatiloquent, fearful, forbidding, foreboding, foretelling, forewarning, forthcoming, frightening, frightful, gloomy, grim, haunting, heralding, ill-boding, ill-fated, ill-starred, inauspicious, indicative, intimidating, mantic, menacing, minacious, minatorial, minatory, monitory, ominous, oracular, perilous, portending evil, premonitive, premonitory, presageful, presaging, presentient, prophetic, prophetical, pythonic, sibylline, sinister, somber, suggestive, threatening, unpropitious
III
index
dire, imminent, important (significant), ominous, oracular, presageful, prophetic, unusual
Burton's Legal Thesaurus.
William C. Burton.
2006