fluency

Noun

• the quality of being facile in speech and writing

• skillfulness in speaking or writing

• powerful and effective language
  • his eloquence attracted a large congregation
    
  • fluency in spoken and written English is essential
    
  • his oily smoothness concealed his guilt from the police
    

Related words

• Synonyms: 
  volubility , articulateness , eloquence , smoothness