​​​Acarology

Aerology (the study of the atmosphere, especially away from ground #level)

Aetiology (Etiology)

Agrology

Algology (The study of algae)

Amphibology

Analogy

Andrology (Branch of physiology)

Anemology

Anesthesiology

Angelology; Gnostic angelology (Pseudo-Dionysius)

Angiology

Anthology

Anthropology; Cultural anthropology; Linguistic anthropology; Social anthropology; Sociocultural anthropology

Antilogy

Apiology

(Apology)

Arachnology (spiders)

Archeology; Archaeology

Archology

Areology (Ares, Aries, the study of the planet Mars)

Astrology

Audiology

Autecology

Axiology

Bacteriology

Balneology

Bibliology

Biology; Aerobiology; Astrobiology; Chronobiology; Cryobiology; Exobiology; Hydrobiology; Marine Biology; Microbiology; Neurobiology; Paleobiology; Pathobiology; Photobiology; Psychobiology; Radiobiology; Sociobiology; Xenobiology

Bromatology

Bryology (The study of mosses and liverworts)

Cardiology

Cariology

Carpology

Cetology (Branch of zoology)

Chronology; Geochronology

Climatology; Paleoclimatology

Codicology

Cohomology

Companology

Conchology

Coprology (Another term for scatology)

Cosmetology

Cosmology

Craniology

Criminology

Cryology

Cryptology

Cytology (The branch of biology concerned with the structure and function of plant and animal cells)

Dactylology

Datalogi (Danish, computer science)

Demonology

Dendrology (The scientific study of trees)

Deontology

Dermatology

Dialectology

Doxology

Ecclesiology

Ecology (Oecology); Paleoecology; Radioecology

Egyptology

Electrology

Embryology

Endocrinology (Branch of physiology)

Enology (The study of wines)

Entomology

Enzymology

Epidemiology

Epiphytology

Epistemology

Epizootiology

Escapology

Eschatology (the part of theology concerned with death, judgment, and the final destiny of the soul and of humankind.); Christian eschatology

Ethnology

Ethology

Etiology (Aetiology)

Etymology (The study of the origin of words and the way in which their meanings have changed throughout history.)

Eulogy

Fetology

Futurology

Garbology

Gemology (or Gemmology, gemstones, branch of mineralogy)

Genealogy

Geology; Photogeology

Gerontology

Glaciology

Graphology

Gynecology (Gynaecology)

Hagiology

Haplology

Helminthology

Hematology (The study of the physiology of the blood)

Herbology

Herpetology (the branch of zoology concerned with reptiles and amphibians)

Hierology

Histology

Homology

Horology (The study and measurement of time)

Hydrology; Geohydrology

Hymnology

Hypnology

Ichnology

Ichthyology (Branch of zoology)

Iconology

Ideology; Idealogy

Immunology

Iridology

Karyology

Kinesiology (Body kinetic intelligence)

Kremlinology

Laryngology

Lepidopterology

Lexicology

Lichenology

Limnology

Lithology

Liturgiology

Logy (denoting a subject of study or interest)

Lycanthropology (werewolf)

Malacology (branch of zoology)

Malariology

Mammalogy (branch of zoology)

Martyrology

Menology (calendar of the Greek orthodox church)

Meteorology (phenomenal); Biometeorology; Exo-meteorology

Methodology

Metrology

Mineralogy

Misology

Missiology

Mixology (Cocktail mixer)

Monology

Morphology; Micromorphology; Geomorphology

Museology

Musicology; Ethnomusicology

Mycology (the scientific study of fungi)

Myology (the study of the structure, arrangement, and action of muscles)

Myrmecology (branch of entomology that deals with ants)

Mythology

Narratology

Necrology

Nematology

Neology

Nephology

Nephrology

Neonatology

Neurology

Nomology

Nosology (Branch of medical science)

Nostology

Numerology (The branch of knowledge that deals with the occult significance of numbers)

Oceanology (Another term for oceanography)

Odontology (The scientific study of the structure and diseases of teeth)

Oenology; Oinology

-Ology (A subject of study; a branch of knowledge)

Oncology

Onomatology

Ontology (Branch of metaphysics)

Oology (The study or collecting of birds' eggs)

Ophiology (Branch of zoology)

Ophthalmology

Organology

Orismology

Ornithology

Orology

Osteology

Otolaryngology

Otology

Paleology

Paleontology

Palynology

Papyrology

Parasitology

Pathology; Pathophysiology (Physiopathology);

Psychopathology; Immunopathology; Neuropathology;

Pedology (Another term for soil science)

Penology

Phytopathology; Paleopathology

Periodontology

Petrology

Pharmacology

Phenology

Phenomenology

Philology

Phlebology

Phonology

Phraseology

Phrenology

Phycology

Physiology; Ecophysiology; Neurophysiology; Histophysiology

Phytology

Planetology

Pneumatology

Poenology

Politology (rare, the branch of social science concerned with theory, description, analysis and prediction of political behavior, political systems and politics broadly-construed.)

Pomology (the science of growing fruit)

Posology (the part of medicine concerned with dosage)

Praxeology

Primatology (branch of zoology)

Proctology (the branch of medicine concerned with the anus and rectum)

Psephology

Psychology; Freudian psychology; Jungian psychology; Metapsychology; Neuropsychology; Parapsychology (Phenomenal); Pop psychology

Pteridology

Pulmonology

Pyrology

Radiology (Roentgenology)

Reflexology (Also known as [Zone Therapy])

Rheology

Rheumatology

Rhinology

Runology (the study of runes and runic writings)

Salmonology

Sarcology

Scatology

Scientology (And Dianetics)

Sedimentology

Seismology

Selenology

Semasiology (Branch of linguistics)

Semeiology

Semiology (Another term for semiotics)

Serology

Sexology

Sinology (The study of Chinese language, history, customs, and politics)

Sitology

Sociology; Phytosociology

Somatology

Soteriology (Branch of theology)

Speleology

Stereology

Symbology

Symptomatology

Synecology

Tautology

Technology; Nanotechnology; Antitechnology; Cytotechnology; Biotechnology

Teleology (the explanation of phenomena in terms of the purpose they serve rather than of the cause by which they arise.)

Teratology

Terminology (Deterministic usage of numbers, symbols, special characters and languages)

Tetralogy (Quadrilogy)

Thanatology

Theology

Tocology

Tokology

Topology

Toxicology

Tribology

Trichology

Trilogy

Tropology

Typology

Ufology (The study of UFOs)

Uranology

Urbanology

Urology

Venology

Vexillology (The study of [flags])

Victimology (The study of the victims of crime and the psychological effects on them of their experience)

Virology

Vulcanology (Obsolete %variant% of Volcanology)

Zoology; Cryptozoology; Paleozoology; Protozoology

Zymology​​​​​