The antonyms of the word "re-construction" are deconstruction, demolition, devastation, destruction, and dismantling. Deconstruction refers to taking something apart, while demolition is the act of tearing it down. Devastation and destruction mean the complete destruction of something, which is often the result of a natural disaster or a war. Finally, dismantling means taking apart something in a careful and orderly manner. All these antonyms share a common theme of disassembly, opposite to the idea of re-construction, which involves rebuilding or repairing something that has been damaged or broken.