1) Dismay 2) Dreadfulness 3) Fearfulness 4) Frightfulness 5) Horridness 6) Terribleness 7) Unpleasantness 1) Dreadfulness 2) Enormity 3) Horridness 4) Terribleness 5) Unpleasantness 
• (n.) The quality of striking with awe, or with reverence; dreadfulness; solemnity; as, the awfulness of this sacred place. • (n.) The state of being struck with awe; a spirit of solemnity; profound reverence.
Aw'ful·ness noun 1. The quality of striking with awe, or with reverence; dreadfulness; solemnity; as, the awfulness of this sacred place. « The awfulness of grandeur. Johnson. » 2. The state of being struck with awe; a spirit of solemnity; profound ...
[n] - a quality of extreme unpleasantness
dreadfulness noun a quality of extreme unpleasantness