There are several other words that can be used in place of "open sanction." One such synonym is "public reprimand," which refers to a formal rebuke or scolding in front of others. Another option is "public censure," which denotes an official condemnation or criticism that is made public. "Public condemnation" is also a suitable alternative, as it implies an expression of disapproval or outrage that is made known to the public. Additionally, "ostracism" can be used to describe the act of being excluded or shunned by a group or community, often as a form of punishment.