voluptuousness vs pulchritude

voluptuousness and pulchritude both are nouns.

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

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

voluptuousness (noun)	pulchritude (noun)
the quality of having a well-rounded body	physical beauty (especially of a woman)
the property of being lush and abundant and a pleasure to the senses
the quality of being attractive and exciting (especially sexually exciting)