brokenheartedness vs heartache

brokenheartedness and heartache both are nouns.

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

As nouns, brokenheartedness and heartache are synonyms defined as:

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

Other synonyms of brokenheartedness include grief, heartbreak.

brokenheartedness (noun)	heartache (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)