very great in amount, scale, or intensity.
"Penny put in a tremendous amount of time"
synonyms: very great, huge, enormous, immense, colossal, massive, prodigious, stupendous, monumental, mammoth, vast, gigantic, giant, mighty, epic, monstrous, titanic, cosmic, towering, king-sized, king-size, gargantuan, Herculean, Brobdingnagian; More
very loud, deafening, ear-splitting, ear-piercing, booming, thundering, thunderous, roaring, resounding, crashing
antonyms: tiny, small, slight, soft
extremely good or impressive; excellent.
“the crew did a tremendous job”
synonyms: excellent, wonderful, marvellous, magnificent, superb, splendid, glorious, sublime, lovely, delightful, first-class, first-rate, outstanding;
antonyms: bad, poor
inspiring awe or dread.