a.
1.
Afraid, apprehensive, haunted with fear.
2.
Timid, timorous, nervous, faint-hearted, chicken-hearted, white-livered, cowardly, pusillanimous, showing the white feather, easily frightened.
3.
Terrible, dreadful, frightful, dire, direful.
4.
Awful, to be reverenced or revered.