portentous Synonyms

fateful pompous pontifical prodigious grandiloquent foreboding overblown unpropitious serious resultful remarkable prophetic prodromal prodromic prescient premonitory predictive precautional tallish pontific unpromising significant portentously significative ill-fated hellfire meaningful sibyllic revelatory weighty vital unlucky threatening substantial solemn sinistrous sinister phenomenal outstanding earnest dumfounding doomful direful dire crucial critical constitutive consequential baleful auspicial