simplicity vs simmpleness

simplicity and simmpleness both are nouns.

Word	Noun	Adjective	Verb	Adverb
simplicity	Yes	No	No	No
simmpleness	Yes	No	No	No

As nouns, simplicity and simmpleness are synonyms defined as:

simplicity (noun)	simmpleness (noun)
freedom from difficulty or hardship or effort	absence of affectation or pretense
lack of ornamentation
the quality of being simple or uncompounded
absence of affectation or pretense
a lack of penetration or subtlety