Commensurateness
Part of speech: noun
Definition: The state or quality of being commensurate.
Correspondence
Part of speech: noun
Definition: Friendly discussion.Reciprocal exchange of civilities, especially conversation between persons by means of letters.An agreement of situations or objects with an expected outcome.Newspaper or news stories, generally.Postal or other written communications.Another name for a relation, plural correspondences.
Example sentence: I have 800 books of just Samuel Beckett's work, tons of his correspondence, personal letters that he wrote. I have copies of plays he used when he directed, so all of his handwritten notes are in the corners of the page.