Silkiness
Part of speech: noun
Definition: The property of being silky.
Sleekness
Part of speech: noun
Definition: In a sleek manner.
Silkiness as a noun is the property of being silky. while Sleekness as a noun is in a sleek manner.
Part of speech: noun
Definition: The property of being silky.
Part of speech: noun
Definition: In a sleek manner.
We hope you now know whether to use Silkiness or Sleekness in your sentence.