I. monstrous adjective
1.
extremely impressive
the traditional burial ceremonies turned into a monstrous spectacle
Synonyms: cracking, fantastic, massive, monumental, mortal, prodigious, stupendous, towering, tremendous
Related Word: grandiose, impressive, magnificent, showy, splendid, superb; colossal, enormous, huge, immense, mammoth, vast
Contrasted words: mean, petty, picayune, poky, small-time
2.
Synonyms: huge , Brobdingnagian, colossal, elephantine, enormous, gargantuan, gigantic, mammoth, prodigious, titanic
3.
Synonyms: outrageous 2, atrocious, crying, desperate, heinous, scandalous, shocking
Related Word: glaring, rank; fateful, ominous, portentous; flagitious, infamous
II. ||monstrous adverb
Synonyms: very 1, ||awful, awfully, ||big, ||dreadful, extremely, mightily, mighty, rattling, snapping