quietude vs easiness

quietude and easiness both are nouns.

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

As nouns, easiness is a hyponym of quietude; that is, easiness is a word with a more specific, narrower meaning than quietude:

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

Other hyponyms of quietude include ataraxis, heartsease, peace, peace of mind, peacefulness, repose, serenity, relaxation.

quietude (noun)	easiness (noun)
a state of peace and quiet	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