Synonyms for Disquiet (same or very similar meaning)
WordNet sense 1 (a feeling of mild anxiety about possible developments):
anxiousnessWordNet sense 2 (the trait of seeming ill at ease):
unease, uneasinessWordNet sense 3 (disturb in mind or make uneasy or cause to be worried or alarmed):
cark, disorder, distract, perturb, trouble, unhingeFrom the ODE community, based on WordNetadd/edit