Wiktionary
epeolatry
n. The worship of words.
Wikipedia
Epeolatry
Similar to idolatry and iconodulism, epeolatry literally means the worship of words. It derives from ἔπος épos, which unlike λόγος lógos more specifically means word in Greek, and was apparently coined in 1860 by Oliver Wendell Holmes, Sr.
The word seems to have gained popularity through blogging activities, e.g. online diaries and the like.