When looking for synonyms for the word "obliterative," one could use words such as destructive, annihilative, eradicative, or demolishing. Other options include the words ruinous, devastating, or withering. These words all convey a sense of overwhelming destruction or annihilation. Another option could be to use the word "obliterating" instead, which has a similar meaning but may flow better in certain contexts. Whichever synonym is chosen, it should communicate a sense of complete obliteration or destruction, indicating that something is being wiped out entirely without the possibility of recovery.