wonderfulness vs excellence

wonderfulness and excellence both are nouns.

Word	Noun	Adjective	Verb	Adverb
wonderfulness	Yes	No	No	No
excellence	Yes	No	No	No

As nouns, excellence is a hypernym of wonderfulness; that is, excellence is a word with a broader meaning than wonderfulness:

wonderfulness: admirable excellence
excellence: the quality of excelling; possessing good qualities in high degree

wonderfulness (noun)	excellence (noun)
admirable excellence	the quality of excelling; possessing good qualities in high degree
	an outstanding feature; something in which something or someone excels