Ponderousness
Part of speech: noun
Definition: The quality of being ponderous.
Heftiness
Part of speech: noun
Definition: The property of being hefty.
Ponderousness as a noun is the quality of being ponderous. while Heftiness as a noun is the property of being hefty.
Part of speech: noun
Definition: The quality of being ponderous.
Part of speech: noun
Definition: The property of being hefty.
We hope you now know whether to use Ponderousness or Heftiness in your sentence.