9-letter words
biography, epigraphy, geography, orography
10-letter words
autography, cacography, demography, holography, ideography, kymography, nomography, renography, serigraphy, sonography, telegraphy, tomography, topography, typography, venography, xerography, xylography
11-letter words
angiography, aortography, calligraphy, cartography, chirography, chorography, cosmography, discography, ethnography, filmography, flexography, hagiography, hydrography, iconography, lithography, mammography, mythography, orthography, paleography, petrography, phonography, photography, pictography, planography, pornography, radiography, reprography, scenography, stenography, stylography, uranography, videography
12-letter words
bibliography, biogeography, cardiography, choreography, chronography, cryptography, fluorography, lexicography, lymphography, oceanography, phlebography, physiography, polarography, scintigraphy, seismography, shadowgraphy, stereography, stratigraphy, thermography, zoogeography
13-letter words
arteriography, autobiography, metallography, oscillography, prosopography, spectrography
14-letter words
chromatography, cinematography, historiography, paleogeography, phytogeography, pseudepigraphy
15-letter words
antipornography, autoradiography, biostratigraphy, cholangiography, crystallography, encephalography, phototelegraphy, plethysmography, psychobiography, radioautography, radiotelegraphy, roentgenography, semipornography, telephotography, ultrasonography, xeroradiography
16-letter words
astrophotography, echocardiography, electromyography, lymphangiography, macrophotography, microphotography, microradiography, photolithography, photomicrography, rechromatography
17-letter words
angiocardiography, chromolithography, phonocardiography, photofluorography, stereophotography
18-letter words
electrooculography, electrophotography, spectroheliography
19-letter words
electrocardiography, electroretinography
22-letter words
electroencephalography
