Horrible, a.
Etymology: [OE. horrible, orrible, OF. horrible, orrible, F. horrible, fr. L. horribilis, fr. horrere. See Horror.]
Exciting, or tending to excite, horror or fear; dreadful; terrible; shocking; hideous; as, a horrible sight; a horrible story; a horrible murder. A dungeon horrible on all sides round. Milton.
Syn. -- Dreadful; frightful; fearful; terrible; awful; terrific; shocking; hideous; horrid.
Shades of meaning
Fernald has no entry of its own for horrible; he lists it under awful.
He lists it without comment; the entries above explain its neighbors.