Trying to improve my understanding of biblical greek and ran across something odd.
Theos - Θεός is nominative.
Theon - Θεόν is accusative.
TheO - Θεῷ is dative.
Theou - Θεοῦ genitive.
Theoi - θεοί seems to be plural.
What would he vocative case version of Theos be? From what I've read singular masculine words would generally replace the ός with an ε, leaving us with Θεε, which doesn't seem right. ... if theos were to be used in the vocative case, would it just be written in the nominative form?