Similar to idolatry and iconodulism, epeolatry literally means the worship of words. It derives from epos, which unlike logos more specifically means word in Greek, and was apparently coined in 1860 by Oliver Wendell Holmes, Sr.. You may be hard-pressed to find an admitted epolatrist because the term connotes a sort of blind devotion, sanctimony, or hypocrisy; or more specifically, an advanced form of reification. Figuratively speaking, the word can be playfully applied to philologists, linguists, or lexicographers.
The term is of significant satirical value and may be used in the denigration of popular religions or belief systems. For example, one could call Christianity an epeolatric religion because the majority of its teachings hinge on the words of the Hebrew Bible. However, you are unlikely to encounter the word in any form because it remains obscure.
Suggested entry at the new word-centric site, Wordnik.