mediocrity vs averageness

mediocrity and averageness both are nouns.

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

As nouns, mediocrity and averageness are synonyms defined as:

mediocrity and averageness: ordinariness as a consequence of being average and not outstanding

mediocrity (noun)	averageness (noun)
ordinariness as a consequence of being average and not outstanding	ordinariness as a consequence of being average and not outstanding
a person of second-rate ability or value	the state of being that is average; indicates normality but with connotations of mediocrity