General Synonyms:
* Apprehension: A feeling of dread or fear about something that might happen.
* Worry: A state of unease or nervousness about something.
* Nervousness: A feeling of unease or agitation.
* Tension: A feeling of tightness or stress.
* Fear: A strong feeling of apprehension or dread.
More Specific Terms:
* Stress: A state of mental or emotional strain or tension resulting from adverse or demanding circumstances.
* Panic: A sudden feeling of intense fear that can be accompanied by physical symptoms like rapid heart rate, sweating, and difficulty breathing.
* Dread: A feeling of intense apprehension or fear about something that is about to happen.
* Angst: A feeling of deep and pervasive anxiety or distress.
* Disquiet: A feeling of uneasiness or anxiety.
* Foreboding: A feeling of something bad about to happen.
Informal Language:
* Jitters: A feeling of nervousness or anxiety.
* Fret: To worry or be anxious.
* Stress out: To feel overwhelmed and anxious.
The best synonym for "anxiety" will depend on the specific context and the desired level of formality.