embonpoint vs buxomness

embonpoint and buxomness both are nouns.

Word	Noun	Adjective	Verb	Adverb
embonpoint	Yes	Yes	No	No
buxomness	Yes	No	No	No

As nouns, buxomness is a hyponym of embonpoint; that is, buxomness is a word with a more specific, narrower meaning than embonpoint:

embonpoint: the bodily property of being well rounded
buxomness: the bodily property of being attractively plump and vigorous and (of women) full-bosomed

Other hyponyms of embonpoint include chubbiness, pudginess, rolypoliness, tubbiness.

embonpoint (noun)	buxomness (noun)
the bodily property of being well rounded	the bodily property of being attractively plump and vigorous and (of women) full-bosomed

embonpoint (adjective)	buxomness (adjective)
sufficiently fat so as to have a pleasing fullness of figure