Open English Wordnet
Adjectives
(s)colossal, prodigious, stupendousso great in size or force or extent as to elicit awe“colossal crumbling ruins of an ancient temple”, “has a colossal nerve”, “a prodigious storm”, “a stupendous field of grass”, “stupendous demand”
(s)portentous, prodigiousof momentous or ominous significance“such a portentous … monster raised all my curiosity” (Herman Melville), “a prodigious vision”
(s)exceeding, exceptional, olympian, prodigious, surpassingfar beyond what is usual in magnitude or degree“a night of exceeding darkness”, “an exceptional memory”, “olympian efforts to save the city from bankruptcy”, “the young Mozart's prodigious talents”