The Indian state Odisha, formerly known as Orissa, was actually not renamed. The original Odian language name is ଓଡ଼ିଶା and in 2011 the English rendering of word was changed. The Hindi rendering उड़ीसा (uṛīsa) was also modified to ओड़िशा (oḍisha).
The eastern part of the state is coastal plain, fertile silt deposited by the six major rivers flowing into the Bay of Bengal: Subarnarekha, Budhabalanga, Baitarani, Brahmani, Mahanadi and Rushikulya. This is the worst possible geology for underground structures, there are neither natural caves nor subterranea. Those structures are restricted to mountain ranges in the rest of the state.