fluency

nouns

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"
eloquence, fluency, smoothness
is derived from
fluent
skillfulness in speaking or writing
fluency
antonym
disfluency
is derived from
fluent
is a type of (narrower)
the state of being cognitively skillful
skillfulness
the quality of being facile in speech and writing
articulateness, fluency, volubility
is derived from
fluent