noun (n)

• using language effectively to please or persuade(noun.communication)

  source: wordnet30
• high-flown style; excessive use of verbal ornamentation(noun.communication)

  Synonym:
  grandiloquence, grandiosity, magniloquence, ornateness
  

  source: wordnet30
• loud and confused and empty talk(noun.communication)

  Example:
  Mere rhetoric.
  

  Synonym:
  empty talk, empty words, hot air, palaver
  

  source: wordnet30
• study of the technique and rules for using language effectively (especially in public speaking)(noun.cognition)

  source: wordnet30
• The art of composition; especially, elegant composition in prose.(noun)

  source: webster1913