"Murder wholesale" is a troubling phrase that refers to the act of killing on a mass scale. To convey the same sense of violence without using this specific phrase, synonyms such as "massacre," "slaughter," and "butchery" could be used. Other related terms include "genocide," "annihilation," and "extermination." These words are often used to describe horrific events in history, such as the Holocaust or the Khmer Rouge regime in Cambodia. While it is important to accurately convey the severity of such atrocities, it is also crucial to use language that is respectful and sensitive to those affected by them.