De commissioning is a term that is commonly used in the energy industry to refer to the process of dismantling or decommissioning power plants, oil rigs, and other energy infrastructure that are no longer operational. Synonyms for de commissioning include decommissioning, dismantling, disassembly, demolition, removal, or retirement. Depending on the context, some of the other synonyms for de commissioning can include shutdown, closure, cessation, abandonment, or discontinuation. While the term de commissioning typically refers to the energy industry, it can also apply to other industries, such as military or transportation, where the process of retiring or removing outdated equipment or infrastructure is necessary.