calmness vs repose

calmness and repose both are nouns.

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

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

Other hyponyms of calmness include aplomb, assuredness, cool, poise, sang-froid, placidity, quiet, serenity, tranquility, tranquillity.

calmness (noun)	repose (noun)
steadiness of mind under stress	freedom from activity (work or strain or responsibility)
a feeling of calm; an absence of agitation or excitement	a disposition free from stress or emotion
an absence of strong winds or rain	the absence of mental stress or anxiety

calmness (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