In the interest of means for the benefit or advantage of. It is a common phrase used in communication to indicate that one is doing something for good or positive reasons. There are several synonyms for this phrase such as, for the sake of, for the good of, in the name of, to further, to promote, to advance and to safeguard. These synonyms can be used interchangeably depending on the context and the level of formality required. Overall, the use of these synonyms for in the interest of helps to convey a positive narrative and supports the principle of acting for the greater good.