Awful, terrible.

Causing fear; inspiring terror, reverence, or awe; dreadful, terrible, awful.

objectively. Inspiring fear; awsome, dreadful; = fearful, adj. 1.

Arousing or inspiring reverential respect, mixed with wonder or fear; awe-inspiring. Cf. awe, n.1 1b.

Awe-inspiring; horrible; grisly.

Inspiring fear, awe, or horror; such as to cause one to shudder with fear; fearful, horrible; grisly.

Arousing or inspiring awe; that fills someone with reverential fear, wonder, or respect.

= tremendous, adj.

Characterized by or resulting from awe; esp. expressing awe or reverence; reverential.

Such as to excite trembling, or awe; awful; ‘dreadful; horrible; astonishingly terrible’ (Johnson).

That inspires an awed sense of mystery.