averageness vs mundaneness

averageness and mundaneness both are nouns.

Word	Noun	Adjective	Verb	Adverb
averageness	Yes	No	No	No
mundaneness	Yes	No	No	No

As nouns, mundaneness is a hypernym of averageness; that is, mundaneness is a word with a broader meaning than averageness:

averageness: ordinariness as a consequence of being average and not outstanding
mundaneness: the quality of being commonplace and ordinary

Other hypernyms of averageness include mundanity, ordinariness.

averageness (noun)	mundaneness (noun)
ordinariness as a consequence of being average and not outstanding	the quality or character of being intellectually sophisticated and worldly through cultivation or experience or disillusionment
the state of being that is average; indicates normality but with connotations of mediocrity	the quality of being commonplace and ordinary