Episteme
"Episteme" is a philosophical term derived from the Ancient Greek word ἐπιστήμη "epistēmē", which can refer to knowledge, science or understanding, and which comes from the verb , meaning "to know, to understand, or to be acquainted with".
Gnosiology
The term is derived from the Ancient Greek words "gnosis" ("knowledge", γνῶσις) and "logos" ("word" or "discourse", λόγος). Linguistically, one might compare it to epistemology, which is derived from the Greek words "episteme" ("certain knowledge") and "logos".