SYNONYMS
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
informal butterflies, butterflies in one's stomach, the willies, the heebie-jeebies, the jitters, the shakes, the jumps, the yips, collywobbles, jitteriness, jim-jams, twitchiness
British informal the abdabs, the screaming abdabs
Australian rhyming slang Joe Blakes
North American archaic worriment