The word "re-erect" means to put something up again after it has been taken down or fallen. Antonyms for the word include "destroy," which means to tear down or demolish, "dismantle," which means to take apart, "disassemble," which means to take something apart into its component parts, and "flatten," which means to make something level with the ground. Other antonyms for "re-erect" include "ruin," "demolition," "destruction," "demolish," "teardown," "dismantlement," "disassembly," "wreckage," and "disintegrate." These antonyms provide a range of options for describing the opposite of "re-erecting" or rebuilding something.