3 Syllablesbryology, geology, neology, oology, theology, zoology
4 Syllablesaerology, anthology, apology, astrology, balneology, biology, cacology, chronology, cosmology, cytology, dendrology, deontology, ecology, embryology, ethnology, ethology, genealogy, graphology, horology, hydrology, ichthyology, ideology, limnology, metrology, muscology, mycology, mythology, necrology, nephology, neurology, nosology, oncology, ontology, osteology, otology, pedology, penology, petrology, phenology, phonology, phraseology, phrenology, pomology, psychology, seismology, sexology, sinology, tautology, technology, teleology, tocology, tokology, tropology, urology, virology
5 Syllablesaetiology, agrostology, amphibology, anthropology, archaeology, cardiology, climatology, cosmetology, criminology, dactylology, dermatology, egyptology, entomology, etiology, etymology, futurology, gerontology, gynaecology, immunology, insectology, laryngology, lexicology, malacology, meteorology, methodology, mineralogy, odontology, ophthalmology, ornithology, pharmacology, physiology, radiology, selenology, sociology, stomatology, teratology, thremmatology, toxicology
6 Syllablesaerobiology, agrobiology, bacteriology, dialectology, endocrinology, microbiology, palaeontology, semasiology
7 Syllablesepidemiology