στρατεία (on the orthogr., see Deiss., BS, 181 f.), -ας, ἡ (< οτρατεύω), [in LXX chiefly for צָבָא ;] an expedition, a campaign, warfare: metaph., 2Co.10:4 (-τιά, T), 1Ti.1:18.† (AS)
Thayer:
1) an expedition, campaign, military service, warfare 2) metaph. Paul likens his contest with the difficulties that oppose him in the discharge of his apostolic duties, as warfare
στρατεία
strateia
strat-i'-ah
From G4754; military service, that is, (figuratively) the apostolic career (as one of hardship and danger)
στρατεύομαι
strateuomai
strat-yoo'-om-ahee
Middle voice from the base of G4756; to serve in a military campaign; figuratively to executetheapostolate (with its arduous duties and functions), to contend with carnal inclinations
KJV Usage: soldier, (go to) war (-fare).
G497 ἀντιστρατεύομαιἀντιστρατεύομαι
antistrateuomai
an-tee-strat-yoo'-om-ahee
From G473 and G4754; (figuratively) to attack, that is, (by implication) destroy
KJV Usage: war against.
G4753 στράτευμαστράτευμα
strateuma
strat'-yoo-mah
From G4754; an armament, that is, (by implication) a body of troops (more or less extensive or systematic)