Synonyms for Admonitory (same or very similar meaning)
WordNet sense 1 (serving to warn):
cautionary, exemplary, monitory, warningWordNet sense 2 (deterring from action):
dissuasiveWordNet sense 3 (expressing reproof or reproach especially as a corrective):
reproachful, admonishing, reprovingWordNet sense 4 (not encouraging or approving or pleasing):
unfavorable, unfavourableFrom the ODE community, based on WordNetadd/edit