An unpleasant state of mental uneasiness, nervousness, apprehension and obsession or concern about some uncertain event.
An uneasy or distressing desire (for something).
A state of restlessness and agitation, often accompanied by a distressing sense of oppression or tightness in the stomach.
Intense dread, fright, or fear.
The action or quality of causing dread; terribleness, especially such qualities in narrative fiction.
A night terror.
Terrorism.
Something or someone that causes such fear.