noun

A feeling of worry, nervousness, or unease, typically about an imminent event or something with an uncertain outcome.

he felt a surge of anxiety

worry,concern,apprehension,apprehensiveness,consternation,uneasiness,unease,fearfulness,fear,disquiet,disquietude,perturbation,fretfulness,agitation,angst,nervousness,nerves,edginess,tension,tenseness,stress,misgiving,trepidation,foreboding,suspense