Synonyms for anxious according to the Merriam-webster dictionary are aflutter, antsy, atwitter, dithery, edgy, goosey, het up, hinky [slang], hung up, ill at ease, insecure, jittery, jumpy, nervous, nervy, perturbed, queasy (also queazy), tense, troubled, uneasy, unquiet, upset, uptight, worried.