- portentous
- adj1. momentous, fraught, charged, heavy, laden; serious, grave, weighty, consequential, significant; crucial, critical, climacteric, eventful, pivotal, decisive; major, landmark, considerable, vital, of vital interst, all-important, of the utmost importance, high-priority, earthshaking; important, of importance, of significance, of consequence, of weight, of moment, of concern, of interest, not to be overlooked, Inf. not to be sneezed at.2. ominous, foreboding, bodeful, ill-boding, boding evil, ill-omened, of evil portent; inauspicious, unpropitious, unfavorable, unpromising, unfortunate, unlucky, ill-starred, ill-fated, star-crossed, doomed from the start; menacing, threatening, lowering, looming, dark, black, sinister, heavy, gloomy; bad, evil, malign, malignant.3. phenomenal, extraordinary, out-of-the-ordinary, prodigious, remarkable, wondrous, marvelous; amazing, astounding, astonishing, miraculous, surpassing belief, fabulous, fantastic, Sl. far-out; indescribable, mind-boggling, Sl. mind-blowing, Sl. trippy; staggering, breath-taking, Sl. stunning.
A Note on the Style of the synonym finder. 2014.