Antonyms for the word "commissionings" would include decommissioning, closure, or disbandment. These words all convey a sense of ending or dismantling, rather than the initiation or establishment that "commissionings" implies. Additionally, terms such as abandonment, halting, or termination could also serve as antonyms, as they indicate an interruption or cessation of a process, rather than its starting point. These contrasting words highlight the importance of context and perspective when analyzing language, as a single term can have a vast array of potential meanings depending on its usage and the context in which it is encountered.