"At daggers" is a phrase that typically means two people or groups are in a bitter or hostile dispute. There are several synonyms for this phrase that can be used interchangeably depending on the context and tone of the situation. One common synonym is "at each other's throats," which implies a more aggressive and potentially violent conflict. "In conflict" is another commonly used synonym that suggests a more general disagreement or discord. "In a feud" or "at war" also convey a similar idea of ongoing hostility and animosity between two parties. Regardless of the synonym used, the phrase "at daggers" emphasizes the intensity and seriousness of the conflict.