commonness vs prosiness

commonness and prosiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
commonness	Yes	No	No	No
prosiness	Yes	No	No	No

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

commonness: ordinariness as a consequence of being frequent and commonplace
prosiness: commonplaceness as a consequence of being humdrum and not exciting

Other hyponyms of commonness include prosaicness, usualness, overfamiliarity, daily bread.

commonness (noun)	prosiness (noun)
ordinariness as a consequence of being frequent and commonplace	commonplaceness as a consequence of being humdrum and not exciting
sharing of common attributes
the quality of lacking taste and refinement
the state of being that is commonly observed