"Ist" is a popular suffix used in many words to refer to a person or specialist in a particular field. To make your vocabulary versatile and avoid repetitiveness, it is essential to know the synonyms of "ist." One of the most common synonyms for "ist" is "expert," which means a person who is very knowledgeable and skillful in a particular area. Other synonyms include "specialist," "practitioner," "professional," "adept," "master," "skilled practitioner," "pro," and "savvy." It is important to note that the suffix "ist" should always be used after a root word and not added randomly to mean a person involved in any activity.