3 syllables:
audibly, balmily, blossomy, bodily, bonhomie, botany, bottletree, broccoli, caudally, colloquy, colony, comedy, commonly, comparably, conakry, connally, consciously, constancy, constantly, cosily, cozily, crotchety, dottily, foxily, gossipy, homily, honestly, honesty, hostelry, hostilely, knobbly, modestly, modesty, monody, monstrously, novelty, noxiously, obloquy, oddity, odyssey, ology, policy, polity, possibly, probably, prodigy, progeny, promisee, prophecy, prophesy, prosody, psalmody, ptolemy, quality, quantity, rocketry, romany, rommany, rottenly, sodomy, solidly, sovereignty, squalidly, stodgily, talkily, wallaby, wannabe, wannabee, wantonly, watchfully, wobbly

4 syllables:
aerology, agrology, agronomy, algometry, allometry, allotropy, androgeny, anomaly, anthology, apogamy, apology, apostrophe, arthrography, arthroscopy, astrolatry, astrology, astrometry, astronomy, atrocity, autocracy, autogeny, autonomy, bardolatry, biogeny, biography, biology, bureaucracy, cacography, cacophony, callosity, cartography, chronology, commodity, conchology, cosmography, cosmolatry, cytology, democracy, demography, demonstrably, despondency, despondently, dichotomy, dishonesty, doxology, ecology, economy, enology, equality, ethnography, ethnology, ethology, exogamy, ferocity, fluoroscopy, frivolity, gastronomy, geodesy, geography, geology, geometry, globosity, glyptography, gymnosophy, histology, homogeny, homology, horology, hydrography, hydrology, hydrometry, hypocrisy, idolatry, immodestly, immodesty, impossibly, improbably, inconstancy, insolvency, isogamy, isometry, limnology, lithography, lithotomy, lordolatry, mahogany, mammalogy, mammography, monocracy, monogamy, monopoly, monopsony, monotony, monstrosity, morphology, mycology, mythology, naprapathy, neology, neurology, nosology, obnoxiously, oncology, ontogeny, ontology, optometry, orthography, otology, pathology, penology, petrology, philology, philosophy, phonology, photography, phrenology, phylogeny, phytology, planography, plutocracy, pomology, pornography, porosity, precocity, proctology, psephology, psychology, psychometry, pyrolatry, responsibly, seismology, self-consciously, serology, sinology, sonography, spectrometry, spectroscopy, symbolatry, tautology, technology, tetralogy, theocracy, theology, theosophy, thermometry, tocology, top-quality, topography, topolatry, typography, unconsciously, urology, velocity, venography, verbolatry, verbosity, virology, viscometry, viscosity, zoolatry, zoology

5 syllables:
aetiology, anemography, anemometry, angiology, animosity, anorthography, anthropolatry, anthropology, anthropometry, arborolatry, archaeology, archeology, aristocracy, audiology, audiometry, axiology, bibliography, bibliolatry, cardiography, cardiology, celioscopy, choreography, chromatography, climatology, criminology, crystallography, curiosity, demonolatry, densitometry, dermatology, diabolatry, disconsolately, egyptology, embryology, entomology, eschatology, etiology, etymology, genealogy, generosity, gerontology, glutinosity, grandiosity, gynaecology, gynaeolatry, gynecology, gyneolatry, haematology, hagiography, hagiolatry, hagiology, heliolatry, hematology, iconolatry, ideography, ideology, idiolatry, immunology, inequality, irresponsibly, laparoscopy, laparotomy, lexicography, lexicology, mediocrity, methodology, mineralogy, numerosity, oceanography, oenology, ophthalmology, ornithology, palaeology, tragicomedy, paleography, paleology, passamaquody, pharmacology, physiography, physiology, poenology, preciosity, primatology, radiography, radiology, radioscopy, rheumatology, roentgenography, scientology, sociology, sociometry, spelaeology, speleology, sumerology, symbololatry, terminology, thaumatolatry, toxicology, trigonometry, tuberosity, unselfconsciously, uranology, xerography

6 syllables:
agrobiology, antimonopoly, arteriography, assyriology, autobiography, bacteriology, biogeography, biotechnology, cholangiography, cholelithotomy, chromolithography, cinematography, endocrinology, epistemology, geomorphology, glottochronology, hypervelocity, mammothermography, meteorology, microbiology, neurobiology, neuropsychology, numismatology, palaeobotany, palaeontology, palaetiology, paleobotany, paleontology, paletiology, parapsychology, photolithography, protozoology, psychopathology, religiosity, seriocomedy, telephotography, ultrasonography, voluminosity

7 syllables:
anesthesiology, bioclimatology, electromyography, epidemiology, immunopathology, neurophysiology, palaeobiology, palaeodendrology, palaeoethnography, palaeogeography, palaeogeology, palaeopathology, palaeornithology, palaeozoology, paleobiology, paleodendrology, paleoethnography, paleogeography, paleogeology, paleomammalogy, paleopathology, paleornithology, paleozoology, protoanthropology, protoarchaeology, protoarcheology, psychopharmacology, psychophysiology, sociobiology

8 syllables:
micropaleontology, palaeoclimatology, paleoanthropology, paleoclimatology