Synonyms for Sarcastic (same or very similar meaning)
WordNet sense 1 (exposing human folly to ridicule):
satiricalWordNet sense 2 (disdainfully or ironically humorous; scornful and mocking):
sardonicWordNet sense 3 (harshly ironic or sinister):
mordantWordNet sense 4 (capable of wounding):
bitingFrom the ODE community, based on WordNetadd/edit