noun (n)

• the articulation of speech regarded from the point of view of its intelligibility to the audience(noun.communication)

  Synonym:
  enunciation
  

  source: wordnet30
• the manner in which something is expressed in words(noun.communication)

  Synonym:
  choice of words, phraseology, phrasing, verbiage, wording
  

  source: wordnet30
• Choice of words for the expression of ideas; the construction, disposition, and application of words in discourse, with regard to clearness, accuracy, variety, etc.; mode of expression; language; as, the diction of Chaucer's poems.(noun)

  source: webster1913