Put to an end refers to the act of stopping an activity, process, or situation. There are various synonyms that can be used for this phrase, depending on the context and nature of the situation. For instance, halt means to bring or come to a stop. Terminate means to bring something to an end in a formal or definite manner. Cease means to stop or come to an end. Conclude refers to bringing something to an end by executing a final action or making a final statement. Finish means to come to the end of something and complete it entirely. Ultimately, the choice of the synonym depends on the writer's intent and the context in which the phrase is used.