General terms:
* Whistleblower: This is the most common and straightforward term, often used in legal and corporate contexts. It refers to someone who exposes misconduct within an organization.
* Advocate: This emphasizes the person's role in speaking up for what they believe is right, often in the face of opposition.
* Activist: This emphasizes the person's commitment to social change and their willingness to take action to address wrongdoing.
More specific terms:
* Conscience keeper: This emphasizes the person's moral compass and their duty to speak out against injustice.
* Truth-teller: This emphasizes the person's willingness to expose the truth, even if it is uncomfortable or unpopular.
* Vigilante: This term is often used in a more negative context, referring to someone who takes the law into their own hands.
* Reformist: This describes someone who seeks to improve or change existing systems or practices that are considered unethical or unjust.
Other words:
* Informant: This term can have a negative connotation, suggesting that the person is motivated by self-interest rather than a desire to do the right thing.
* Dissenter: This describes someone who disagrees with a majority opinion or policy, often in a formal or political setting.
* Critic: This refers to someone who evaluates and expresses opinions, often pointing out flaws or shortcomings.
The most appropriate term will depend on the specific context and the nature of the wrongdoing being exposed.