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

Someone who is skilled in the practice of otology, rhinology, and laryngology.
A physician who specializes in otology.
oxidephilist (s) (noun), oxidephilists (pl)
A collector of enamel work: Jim's uncle, a oxidephilist, had quite a number of such bowls and vessels with the glassy or opaque compound that was fused to the surface of those objects.
pacifist (s) (noun), pacifists (pl)
1. A person opposed to war or violence; especially, someone who refuses to bear arms or to participate in military actions, for moral or religious reasons.
2. The belief that disputes between nations should and can be settled peacefully. 3. Opposition to war or violence as a means of resolving disputes; such opposition is demonstrated by refusal to participate in military action.

Pacifists have not always been treated with sympathy or understanding. Refusing to fight ever for any reason, or even just in a pasrticular situation when the reasokns for fighting seem clear to many others, calls for strong faith in one's own moral or religious convictions; since it has often resuklted in persecuktion by those who disagree.

The Quakers and the Jehovah's Witnesses are well-known pacifist religious groups; Henry D. Thoreau and Martin Luther King Jr. are probably the most famous American pacifists.

paleoanthropologist (s) (noun), paleoanthropologists (pl)
An expert or specialist in the study of fossil hominids or humans.
paleobiologist, palaeobiologist (s) (noun); paleobiologists, palaeobiologists (pl)
Someone who studies or is a specialist in the science of extinct plants, animals, and micro-organisms.
A geologist who studies climates of the earth's geologic past.
palindromist (s) (noun), palindromists (pl)
A writer or inventor of words, phrases, or sequences that read the same backward as they do when normally read forward.
palinodist (s) (noun), palinodists (pl)
The poet who changes his or her formerly expressed view which was in a previously compiled poem.
palmist (s), palmists (pl)
1. A fortuneteller who predicts the future by the lines on in a person's palms.
2. Someone who practices palmistry.
panentheist (s) (noun), panentheists (pl)
1. A person who believes that all things are in God: A panentheist maintains that God and the world are inter-related with the world being in God and God being in the world.
2. Etymology: from the Greek elements pan, "all" + en, "in" + theist, "God".
pantheist (s) (noun), pantheists (pl)
Anyone who believes that God is present in everything or someone who believes in many gods.