-ist

Someone who advocates, or enforces, the opening of places and organizations to people of all races, genders, and ethnic groups, etc.: Martin Luther King was well-known as a desegregationist and he was assassinated by someone who was opposed to Mr. King's fight for equality of all races.

The second actor or person in a drama as distinguished from the protagonist or leading character.

Someone who favors transferring power from a central government to smaller political units.

One who marries a second time; especially, after the death of the first spouse.

Someone who specializes in the study of dinosaurs.

A writer of dissertations.

In U.S. History, a secessionist during the period of the U.S. Civil War.

One who dogmatizes, who asserts or lays down particular dogmas; especially, one who positively asserts or imposes his own opinions; a dogmatic person.

1. Someone who studies houses.
2. A professional housekeeper.

1. A person who performs medical dose measurements: "At the drug rehabilitation center, the nurse who was also the dosimetrist, carefully measured the medications administered to the residents."
2. In radiation therapy, a person trained to make radiation measurements and also performs treatment-planning calculations: "Sean's cousin was trained to become a dosimetrist at the medical college and now he is working at a radiation clinic."

A writer of plays; a playwright.