correspondence
cor-re-spon-dence
noun
A close similarity, agreement, or connection between two or more things.
"We found a clear correspondence between the two reports."
noun
Written communication, especially letters or emails, exchanged between people.
"Please handle all incoming correspondence promptly."
Thesaurus
Synonyms: agreement, commensurateness, proportionateness, symmetry, balance, symmetricalness, parallelism
Antonyms: asymmetry