Meaning ‘discourse about’ or ‘study of‘. Usually preceded by the connective ‘o’.
aetiology (US etiology)
anthology
apology
archaeology (US archeology)
astrology
astronomy
audiology
biology
cardiology
chronology
climatology
cosmetology
cosmology
criminology
cytology
dermatology
ecology
embryology
ethnology
etiology
etymology
geology
gerontology
gynaecology (US gynecology)
haematology (US hematology)
histology
horology
hydrology
ideology
immunology
kinesiology
laryngology
meteorology
methodology
morphology
musicology
mythology
nephrology
neurology
numerology
oncology
ontology
pathology
phonology
phraseology
phrenology
physiology
primatology
proctology
psephology
psychology
radiology
seismology
sociology
tautology
technology
theology
topology
toxicology
typology
virology
vulcanology
zoology
Also related to the bound base ‘logue’/’log as in ‘analogue’ and ‘analogous’