brokenheartedness vs heartbreak

brokenheartedness and heartbreak both are nouns.

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

As nouns, brokenheartedness and heartbreak are synonyms defined as:

brokenheartedness and heartbreak: intense sorrow caused by loss of a loved one (especially by death)

Other synonyms of brokenheartedness include grief, heartache.

brokenheartedness (noun)	heartbreak (noun)
intense sorrow caused by loss of a loved one (especially by death)	intense sorrow caused by loss of a loved one (especially by death)