The word dismantled is often used to refer to taking apart or disassembling something. However, when it comes to antonyms, we can look for words that have the opposite meaning of dismantled. Some potential antonyms for dismantled might include the words assembled, constructed, or erected, all of which suggest the process of putting something together. Other possible antonyms could be repaired, fixed, or restored, as these indicate the idea of repairing or restoring something that was previously taken apart. Whichever antonym you choose, it will provide a useful contrast to the original meaning of dismantled and allow you to express a more nuanced idea.