English has so many words that end in ology, and you probably see them all the time without even noticing. In this list, we’ve gathered a bunch of them in one place so you can check them out easily. Let’s take a look!
List of Words That End in Ology
| anthology | anthropology |
| apology | archaeology |
| astrology | biology |
| biotechnology | cardiology |
| chronology | ecology |
| epidemiology | geology |
| ideology | immunology |
| meteorology | methodology |
| microbiology | morphology |
| mythology | nanotechnology |
| neurology | oncology |
| pathology | pharmacology |
| physiology | psychology |
| radiology | sociology |
| technology | terminology |
| theology | topology |
| toxicology | zoology |

7 Letter Words That End In Ology
- apology
- biology
- ecology
- enology
- geology
- myology
- naology
- neology
- noology
- orology
- otology
- ufology
- urology
- zoology
8 Letter Words That End In Ology
| acrology | apiology | cynology |
| aerology | areology | cytology |
| agrology | axiology | doxology |
| algology | bryology | ethology |
| cacology | cetology | etiology |
| cryology | fetology | gemology |
| homology | horology | ideology |
| Indology | menology | misology |
| mixology | monology | mycology |
| nasology | nidology | nomology |
| nosology | oecology | oenology |
| oncology | ontology | pedology |
| penology | podology | pomology |
| posology | rheology | runology |
| semology | serology | sexology |
| sinology | sitology | taxology |
| theology | tocology | tonology |
| topology | typology | virology |
| xylology | zymology |

9 Letter Words Ending In Ology
| acarology | aetiology | andrology |
| anemology | angiology | anthology |
| astrology | atheology | audiology |
| carpology | chirology | chorology |
| coniology | coprology | cosmology |
| eremology | erotology | ethnology |
| etymology | euchology | faunology |
| foetology | fungology | garbology |
| gemmology | gnomology | hagiology |
| haplology | herbology | hierology |
| hippology | histology | homeology |
| hydrology | hyetology | hygrology |
| hymnology | hypnology | ichnology |
| iconology | iridology | karyology |
| leprology | leptology | limnology |
| lithology | macrology | mantology |
| Mariology | mereology | metrology |
| micrology | muscology | museology |
| mythology | necrology | nephology |
| neurology | ombrology | ophiology |
| osteology | paedology | paidology |
| paleology | pantology | pathology |
| patrology | pestology | petrology |
| phenology | philology | phonology |
| phycology | phytology | pistology |
| plutology | quinology | raciology |
| radiology | rhinology | sarcology |
| scatology | semiology | sociology |
| symbology | tautology | teleology |
| therology | tribology | tropology |
| uranology |
10 Letter Words Ending In Ology
| Acridology | Actinology | Agathology |
| Araneology | Archeology | Arthrology |
| Balneology | Bibliology | Bioecology |
| Cardiology | Carphology | Codicology |
| Conchology | Chronology | Creekology |
| Deltiology | Craniology | Dendrology |
| Embryology | Demonology | Edaphology |
| Escapology | Entomology | Enzymology |
| Fluviology | Futurology | Exobiology |
| Glottology | Gynecology | Gastrology |
| Graphology | Heterology | Glaciology |
| Hepatology | Immunology | Gnoseology |
| Missiology | Monadology | Hematology |
| Nematology | Numerology | Heortology |
| Palynology | Organology | Lexicology |
| Phlebology | Papyrology | Morphology |
| Praxeology | Phrenology | Oceanology |
| Psychology | Polemology | Orismology |
| Selenology | Proctology | Physiology |
| Toxicology | Speleology | Psephology |
| Urbanology | Synecology | Semeiology |
| Venerology | Trichology | Technology |
| Autecology | Buddhology | Angelology |
| Cryptology | Deontology | Egyptology |
| Epizoology | Genecology | Glossology |
| Malacology | Musicology | Nephrology |
| Odontology | Pneumology | Potamology |
| Seismology | Somatology | Stereology |
| Teratology | Typhology |

11 Letter Words Ending In Ology
- acanthology
- acarinology
- aerobiology
- aerogeology
- agroecology
- agrogeology
- agrostology
- cryobiology
FAQs about Words That End in Ology
The suffix -ology comes from the Greek -logia, meaning “the study of” or “the science of.” Words ending in -ology usually refer to a field of study or a branch of knowledge, like biology (study of life) or geology (study of Earth).
Yes, here are a few widely used ones:
• Biology – study of living things
• Psychology – study of mind and behavior
• Sociology – study of society
• Geology – study of Earth
• Theology – study of God or religion
• Archaeology – study of human history through artifacts
Sure!
• She studies psychology.
• He loves geology.
• They research criminology.
• I read about biology.
• She teaches sociology.
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