Epistle noun – A specially long, formal letter. Letter is a synonym for epistle in language topic. In some cases you can use "Letter" instead a noun "Epistle", when it comes to topics like words, text. popular alternative
Viewers Are Geniuses: Scholars have observed that this is the only New Testament epistle that seems to be constructed specifically as a theological treatise, rather than a personal letter about specific concerns in the Early Church.