Typical Greek suffixes.
Primary stress on the third syllable from the end.
(First vowel shown may vary.)
ocracy, opathy, otony, otany, otomy, ophony, ology, onomy,
otrophy, ogamy, ography, ophany, osophy, ognomy, ogony, omaly, opoly, ogeny,
ochrony, ochromy, olatry, omathy, ometry,...