Correspondence synonyms

exchange of letters

Communication by letter

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agreement (related)

(Countable) An understanding between entities to follow a specific course of conduct.

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correlation

A relationship or connection between two things based on co-occurrence or pattern of change:

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conformity

State of being conforming, of complying with a set of rules, with a norm or standard.

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communication (related)

A message so exchanged, imparted, or transmitted.

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analogy

(Biol.) Similarity in function between parts dissimilar in origin and structure, as the wing of a bird and that of an insect

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coherence

A property holding for two or more waves or fields when each individual wave or field is in phase with every other one. Lasers, for example, emit almost perfectly coherent light; all the photons emitted by a laser have the same frequency and are in phase. Since quantum states can be described by a wave equation , coherence can hold for quantum states in general, though only among bosons . Coherence is generally possible in physical systems that may undergo superposition . Maintaining coherence of light is important in fiber optic communications.

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agree (related)

The act or state of agreeing or conforming

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equivalence

The state or condition of being equivalent; equality.

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accord

Agreement or harmony of things in general.

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messages

(Plural only, Ireland, Scotland and Northern England) groceries

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mail

A postal system. Used with the, sometimes in the plural:

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letter-writing

Communication by letter

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similarity (related)

A point, feature, or instance in which things are similar

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adaptation

(Biology) The alteration or adjustment in structure or habits, often occurring through natural selection, by which a species or individual becomes better able to function in its environment.

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concurrence

(Geom.) The point where three or more lines or planes meet

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congruity

The condition or fact of being congruous or congruent

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epistle

An excerpt from one of these letters, read as part of a religious service.

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homology

A topological classification of configurations into distinct types that imposes an algebraic structure or hierarchy on families of geometric figures.