easiness vs quietness

easiness and quietness both are nouns.

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

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

easiness: a feeling of refreshing tranquility and an absence of tension or worry
quietness: a state of peace and quiet

Other hypernyms of easiness include quietude, tranquility, tranquillity.

easiness (noun)	quietness (noun)
the quality of being easy in behavior or style	the property of making no sound
freedom from difficulty or hardship or effort	a state of peace and quiet
a feeling of refreshing tranquility and an absence of tension or worry