voluptuousness vs copiousness

voluptuousness and copiousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
voluptuousness	Yes	No	No	No
copiousness	Yes	No	No	No

As nouns, copiousness is a hypernym of voluptuousness; that is, copiousness is a word with a broader meaning than voluptuousness:

voluptuousness: the property of being lush and abundant and a pleasure to the senses
copiousness: the property of a more than adequate quantity or supply

Other hypernyms of voluptuousness include abundance, teemingness.

voluptuousness (noun)	copiousness (noun)
the quality of having a well-rounded body	the property of a more than adequate quantity or supply
the property of being lush and abundant and a pleasure to the senses
the quality of being attractive and exciting (especially sexually exciting)