ologist
The suffix "ologist" is commonly attached to the end of words to denote a person who studies or is an expert in a particular field of study. This suffix is derived from the Greek word "-logia," meaning "study of" or "science of." Therefore, when "-logist" is added to a scientific discipline, it designates an individual who specializes in that area.
For instance, someone who studies geology is a geologist, and a person specializing in biology is a