destroy是破坏的意思，而disaster的则是灾难的意思，区别可以从以下例子看出：
After the earthquake, most of building in the city were destroyed, it is disaster for our nation. We have to rebuild our city. 地震后，城市大部分建筑被毁，对我们国家来说是灾难。 我们必须重建我们的城市。
水利万物而不争,
而万物莫能与之争。
