Difference between Tediousness and Tedium

What is the difference between Tediousness and Tedium?

Tediousness as a noun is the quality of being tedious; wearisomeness; prolixity; tiresomeness; slowness; tedium. while Tedium as a noun is boredom or tediousness; ennui

We hope you now know whether to use Tediousness or Tedium in your sentence.