effortlessness vs simpleness

effortlessness and simpleness both are nouns.

Word	Noun	Adjective	Verb	Adverb
effortlessness	Yes	No	No	No
simpleness	Yes	No	No	No

As nouns, simpleness is a hypernym of effortlessness; that is, simpleness is a word with a broader meaning than effortlessness:

Other hypernyms of effortlessness include ease, easiness, simplicity.

effortlessness (noun)	simpleness (noun)
the quality of requiring little effort	the quality of being simple or uncompounded
	lack of ornamentation
	freedom from difficulty or hardship or effort
	a lack of penetration or subtlety