Severeness
Part of speech: noun
Definition: The property of being severe.
Rigorousness
Part of speech: noun
Definition: The property of being rigorous, strictness.
Severeness as a noun is the property of being severe. while Rigorousness as a noun is the property of being rigorous, strictness.
Part of speech: noun
Definition: The property of being severe.
Part of speech: noun
Definition: The property of being rigorous, strictness.
We hope you now know whether to use Severeness or Rigorousness in your sentence.