Severity
Part of speech: noun
Definition: The state of being severe. The degree of something undesirable; badness.
Severeness
Part of speech: noun
Definition: The property of being severe.
Severity as a noun is the state of being severe. while Severeness as a noun is the property of being severe.
Part of speech: noun
Definition: The state of being severe. The degree of something undesirable; badness.
Part of speech: noun
Definition: The property of being severe.
We hope you now know whether to use Severity or Severeness in your sentence.