Synonyms for DS (same or very similar meaning)
WordNet sense 1 (a radioactive transuranic element):
darmstadtiumWordNet sense 2 (the bureau in the State Department that is responsible for the security of diplomats and embassies overseas):
Bureau of Diplomatic SecurityWordNet sense 3 (an honorary degree in science):
ScD, Doctor of ScienceFrom the ODE community, based on WordNetadd/edit