supertornado means A giant, very severe tornado. Lexicurio rates it Rare gem — a strength score of 82 out of 100.
Etymology
From super- + tornado.
noun
- A giant, very severe tornado.“Suppose that there were nothing we could do about that prospect. The prediction would still have some economic value. People making long-term investments would be aware that some land would become unsuitable for cultivation while other land would become usable; there would be an obvious incentive to reduce long-term development on coastal plains and in areas likely to be subject to superhurricanes”