letters, missives, communications, correspondences
letters - messages - communications - dispatches - memoranda - notes - bulletins - reports - communiqués
“Missives” is the plural form of “missive” and refers to written messages, typically in the form of letters, notes, or formal communications sent from one person or organization to another. The term is often used in somewhat formal or literary contexts to describe correspondence, whether personal, diplomatic, or official. Missives can be brief or lengthy and may be delivered physically or, in modern usage, electronically. They usually convey information, requests, instructions, or sentiments. While the word can sometimes carry a slightly old-fashioned tone, it remains in active use, especially when emphasizing the act of sending written communications.