ology(n = noun.cognition) - an informal word (abstracted from words with this ending) for some unidentified branch of knowledge;
is a kind of bailiwick, discipline, field, field of study, study, subject, subject area, subject field
has particulars: symbology

   A colloquial or humorous name for any science or branch of knowledge. [1913 Webster]
"He had a smattering of mechanics, of physiology, geology, mineralogy, and all other ologies whatsoever." [1913 Webster]