The antonyms for the word "dismantling" are construction, building, assembling, erecting, and setting up. These words indicate the opposite of taking something apart or breaking it down. When we talk about construction, it means building something new from scratch, while dismantling is taking down a structure or object that already exists. Similarly, erecting, assembling, and setting up are all actions that involve creating something new or putting something together, rather than taking it apart. These antonyms are useful in highlighting the different actions involved in creating and destroying objects, buildings, and structures.