There are several synonyms for the word "uncoffin" that can be used interchangeably to convey the removal or uncovering of a coffin. One such synonym is "decasket", which represents the act of taking a coffin out of its designated container. Another option is "exhumate", used specifically when referring to the process of removing a coffin from its burial place. Similarly, the term "disinter" stands as a synonym for uncoffin, often employed to describe the unearthing or exhumation of a buried coffin. All these synonyms aptly capture the act of unveiling a coffin, whether for investigative, ceremonial, or other purposes.