quiet vs calmness

quiet and calmness both are nouns.

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

As nouns, calmness is a hypernym of quiet; that is, calmness is a word with a broader meaning than quiet:

Other hypernyms of quiet include calm, composure, equanimity.

As nouns, calmness is a hypernym of quiet; that is, calmness is a word with a broader meaning than quiet:

quiet (noun)	calmness (noun)
a disposition free from stress or emotion	steadiness of mind under stress
the absence of sound	a feeling of calm; an absence of agitation or excitement
a period of calm weather	an absence of strong winds or rain
an untroubled state; free from disturbances

quiet (adjective)	calmness (adjective)
free of noise or uproar; or making little if any sound
characterized by an absence or near absence of agitation or activity
(of the sun) characterized by a low level of surface phenomena, such as sunspots
(of a body of water) free from disturbance by heavy waves
in a softened tone
not showy or obtrusive

quiet (verb)	calmness (verb)
make calm or still
become quiet or quieter

quiet (adverb)	calmness (adverb)
with little or no activity or no agitation (`quiet' is a nonstandard variant for `quietly')