effortlessness vs easiness

effortlessness and easiness both are nouns.

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

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

Other hypernyms of effortlessness include ease, simpleness, simplicity.

effortlessness (noun)	easiness (noun)
the quality of requiring little effort	the quality of being easy in behavior or style
	freedom from difficulty or hardship or effort
	a feeling of refreshing tranquility and an absence of tension or worry