noun
correspondence
kor-uh-SPAHN-duns/ˌkɔːrəˈspɑːndəns/
Written messages exchanged between people.
The letters and stamped envelopes record their correspondence.

Etymology
“Answering one another” provides the connection to an exchange of letters. The noun first meant agreement or harmony, then came to mean communication by letters and finally the letters themselves.
In context
number. Use a professional salutation like, "Dear Sir/Madam." The body of the letter is critical. Clearly state the purpose of your communication in the first paragraph. Refer to any previous correspondence or notices.
More examples
- She preserved the correspondence for years.
- Their correspondence continued after the move.
- The archive holds his private correspondence.
Forms
correspondence
Similar words
- letters
- Can be individual messages rather than an ongoing exchange.
- communication
- Includes spoken and other nonwritten exchanges.