harmony vs composedness

harmony and composedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
harmony	Yes	No	No	No
composedness	Yes	No	No	No

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

Other hyponyms of harmony include congruence, congruity, congruousness.

harmony (noun)	composedness (noun)
an agreeable sound property	The state or quality of showing composure.
compatibility in opinion and action
agreement of opinions
the structure of music with respect to the composition and progression of chords
a harmonious state of things in general and of their properties (as of colors and sounds); congruity of parts with one another and with the whole