Plainness
Part of speech: noun
Definition: The condition of being plain (in all senses) The product or result of being plain
Perspicuousness
Part of speech: noun
Definition: The state or characteristic of being perspicuous; perspicuity.
Plainness as a noun is the condition of being plain (in all senses) while Perspicuousness as a noun is the state or characteristic of being perspicuous; perspicuity.
Part of speech: noun
Definition: The condition of being plain (in all senses) The product or result of being plain
Part of speech: noun
Definition: The state or characteristic of being perspicuous; perspicuity.
We hope you now know whether to use Plainness or Perspicuousness in your sentence.