-ist

(Greek > Latin: a suffix; one who believes in; one who is engaged in; someone who does something)

gerodontist, geriodontist
A dentist specializing in gerodontics.
gerontologist
One who specializes in gerontology.
glacialist, glacial geologist
1. Someone who studies geological phenomena involving the action of ice; especially, of glaciers.
2. Anyone who attributes the phenomena of the drift, in geology, to glaciers.
glaciologist
One who specializes in the scientific study of glaciers and their phenomena.
glossarist (s) (noun), glossarists (pl)
A compiler or writer of alphabetical lists of often difficult or specialized words with their definitions, often placed at the back of a book.
glottogonist
Someone who studies the origins of languages.
gossophilist
A collector of souvenir China.
governmentalist
1. Someone who has a theory advocating extension of the sphere and degree of government activity.
2. Anyone who has a tendency toward the extension of the role of government.
grammatolatrist
A strong adherence to the forms of words.
grammatologist
A specialist who studies writing systems.
graphiologist
One who is skilled in the craft of writing.
graphologist
One who analyzes handwriting as an expression of character.
graphopathologist (s) (noun), graphopathologists (pl)
Someone who interprets personality disorders from the study of handwriting: Jack thought his uncle's job as a graphopathologist was super interesting because the penmanship of a person was the clue to any mental illnesses that a person might have.
guruophilist
A collector of religious tracts.
gymnobiblist (s) (noun), gymnobiblists (pl)
Those who believe that the Bible can be presented to unlearned readers without commentary or explanations of religious teachers: Roman Catholic doctrine maintains that religious truth comes from the teachings of church priests and nuns and not by gymnobiblists who believe that everyone can read the Scriptures or holy books without having theological guidance.