activist → actually
activist (a person who campaigns to achieve social or political change): He has been a political activist for many years.
activity (things that people do for interest or pleasure): Regular physical activity helps to control your weight.
activity (when people are busy doing different things or are moving around): This street is noisy and full of activity.
actor (someone who acts in plays, films, etc.): His father was an actor.
actress (a female actor): She’s one of the highest-paid actress in Hollywood.
actual (real, true, existing in fact): The movie is based on an actual incident.
actually (in reality or fact): This backpack looks heavy but actually it is very light.