-ist

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

phonologist
Someone who is a specialist in phonology.
phonophilist
A collector of gramophones or old disks (records) that are played on gramophones.
phorologist
An expert in tracing the origin of epidemics; especially, outbreaks due to disease carriers.
phraseologist
1. A collector or coiner (creator) of phrases.
2. A person who treats of, or is concerned with, phraseology.
3. Someone who affects a particular phraseology or is skilled in coining phrases.
phrenologist
One who practices phrenology.
phthisiologist
1. A physician who specializes in phthisiology.
2. An obsolete term for specialist in tuberculosis.
phycologist
physiatrist
1. A physician who specializes in physiatrics.
2. A physician who specializes in physical medicine.
3. A health care professional who administers physical therapy; a physical therapist.
physicist
A scientist who specializes in physics.
physiognomist
1. Someone who practices physiognomy, a pseudoscience, based on the belief that the study and judgement of a person's outer appearance, primarily the face, reflects his/her character or personality.
2. Scientific correlation physiognomy, in which there are believed to be rough statistical correlations between physical features (especially facial features) and character traits due to a person's physical preferences that are caused by corresponding character traits; such that gene mixing causes the correlations; this type of physiognomy is therefore based on genetic determinism of character.
physiologist
1. A natural philosopher; a naturalist who is engaged in the biological study of the functions of living organisms and their parts.
2. Someone who studies the functions of a living organism or any of its parts.
3. A biologist specializing in physiology.
physiotherapist
1. A person who uses physical methods to treat certain ailments.
2. Someone who is competent and qualified to administer physiotherapy.
physiotherpeutist
phytogeographist
Someone who writes descriptions about the geographical distribution of plants.
phytographist
A person who specializes in the descriptions of seaweeds.