Acts 9:2ἐπιστολὰς
and requested letters to the synagogues in Damascus, so that if he found any men or women belonging to the Way, he could bring them as prisoners to Jerusalem.
Romans 16:22ἐπιστολὴν
I, Tertius, who wrote down this letter, greet you in the Lord.
1 Corinthians 5:9ἐπιστολῇ
I wrote you in my letter not to associate with sexually immoral people.
2 Corinthians 3:1ἐπιστολῶν
Are we beginning to commend ourselves again? Or do we need, like some people, letters of recommendation to you or from you?
2 Thessalonians 2:2ἐπιστολῆς
not to be easily disconcerted or alarmed by any spirit or message or letter seeming to be from us, alleging that the Day of the Lord has already come.
2 Peter 3:1ἐπιστολήν
Beloved, this is now my second letter to you. Both of them are reminders to stir you to wholesome thinking

Abbott-Smith

ἐπι-στολή, -ῆς, ἡ
(ἐπιατέλλω), [in LXX for אִגֶּרֶת, etc.; frequently in Mac ;]

1. a message.

2. a letter, an epistle: Act.9:2, 1Co.5:9, al.; pl., Act.22:5, 1Co.16:3, al.; ἐ. σνστατικαί, 2Co.3:1 (cf. Milligan, NTD, 254 f.). (On the NT ἐπιστολαί, cf. Milligan, Th., 121 ff.; NTD, 85 ff.; Deiss., BS, 3 ff.; St. Paul, 8 ff.)
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.