There are several synonyms for the term "total annihilations" such as obliteration, extermination, decimation and annihilation. All of these terms convey a sense of complete destruction and devastation. Obliteration denotes wiping out completely, while extermination implies the act of killing or eradicating from existence. Decimation indicates reducing something by ten percent in number or strength, usually used in the context of an army or a population. Finally, annihilation means utterly destroy or completely wipe out. In summary, these synonyms are used to describe a complete and devastating destruction of something or someone.