brokenheartedness vs sorrow

brokenheartedness and sorrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
brokenheartedness	Yes	No	No	No
sorrow	Yes	No	Yes	No

As nouns, sorrow is a hypernym of brokenheartedness; that is, sorrow is a word with a broader meaning than brokenheartedness:

brokenheartedness: intense sorrow caused by loss of a loved one (especially by death)
sorrow: an emotion of great sadness associated with loss or bereavement

brokenheartedness (noun)	sorrow (noun)
intense sorrow caused by loss of a loved one (especially by death)	something that causes great unhappiness
	an emotion of great sadness associated with loss or bereavement
	sadness associated with some wrong done or some disappointment
	the state of being sad

brokenheartedness (verb)	sorrow (verb)
	feel grief