agitation

chaos, confusion, disorder, havoc, pandemonium, turmoil

bedlam, bother, brouhaha, bustle, clamor, clatter, commotion, disturbance, fuss, hoo-ha (also hoo-hah), hubbub, hullabaloo, hurly-burly, ruckus, ruction, rumpus, shindy, squall, stew, stir, storm, tempest, to-do, tumult

strain, stress, tension

alarm (also alarum), anguish, consternation, desperateness, desperation, discomfort, discomposure, dismay, distraction, distress, disturbance, edginess, hand-wringing, jitters, jumpiness, panic, tremor

angst, fearfulness, torment, upset, vexation

cold feet, doubt, dread, foreboding, incertitude, misgiving, presentiment, suspense, uncertainty

compunction, qualm, scruple