Here are some common uses of the term "ist":
1. Activist: A person who takes action to bring about social or political change.
2. Artist: A person who creates works of art, such as paintings, sculptures, or music.
3. Atheist: A person who does not believe in the existence of any gods.
4. Capitalist: A person who supports or participates in a capitalist economic system, in which private individuals or businesses own and control the means of production.
5. Communist: A person who supports or participates in a communist political or economic system, in which the government or a collective owns and controls the means of production.
6. Environmentalist: A person who is concerned with the protection of the natural environment and the reduction of pollution.
7. Feminist: A person who advocates for women's rights and gender equality.
8. Humanist: A person who emphasizes the importance of human values and rationality, and who rejects the idea of supernatural beings or deities.
9. Imperialist: A person or group that advocates for or practices imperialism, which is the policy of extending political or economic control over other countries or territories.
10. Journalist: A person who gathers, writes, edits, and publishes news articles and reports for a newspaper, magazine, or other media outlet.
These are just a few examples of how the term "ist" is used to describe individuals based on their beliefs, ideologies, or practices.