summum bonum vs goodness

summum bonum and goodness both are nouns.

Word	Noun	Adjective	Verb	Adverb
summum bonum	Yes	No	No	No
goodness	Yes	No	No	No

As nouns, goodness is a hypernym of summum bonum; that is, goodness is a word with a broader meaning than summum bonum:

summum bonum: the supreme good in which all moral values are included or from which they are derived
goodness: moral excellence or admirableness

Other hypernyms of summum bonum include good.

summum bonum (noun)	goodness (noun)
the supreme good in which all moral values are included or from which they are derived	moral excellence or admirableness
	that which is pleasing or valuable or useful