prosaicness vs prosiness

prosaicness and prosiness both are nouns.

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

As nouns, prosaicness and prosiness are synonyms defined as:

prosaicness and prosiness: commonplaceness as a consequence of being humdrum and not exciting

prosaicness (noun)	prosiness (noun)
commonplaceness as a consequence of being humdrum and not exciting	commonplaceness as a consequence of being humdrum and not exciting