quietness vs repose

quietness and repose both are nouns.

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

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

Other hyponyms of quietness include ataraxis, heartsease, peace, peace of mind, peacefulness, serenity, easiness, relaxation.

quietness (noun)	repose (noun)
the property of making no sound	freedom from activity (work or strain or responsibility)
a state of peace and quiet	a disposition free from stress or emotion
	the absence of mental stress or anxiety

quietness (verb)	repose (verb)
	put or confide something in a person or thing
	lie when dead
	put in a horizontal position
	lean in a comfortable resting position
	to put something (eg trust) in something
	be inherent or innate in