Martin Luther King was a prominent figure in American history, known for his activism and advocacy for civil rights. There are many different words and phrases that can be used as synonyms for Martin Luther King, including civil rights leader, social justice advocate, nonviolent activist, and Baptist minister. Other related terms might include equal rights champion, anti-discrimination activist, and peacemaker. Regardless of the specific language used, however, Martin Luther King continues to be remembered and respected as a key figure in the ongoing struggle for justice and equality in the United States and beyond.