heartbreak vs grief

heartbreak and grief both are nouns.

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

As nouns, heartbreak and grief are synonyms defined as:

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

Other synonyms of heartbreak include brokenheartedness, heartache.

heartbreak (noun)	grief (noun)
intense sorrow caused by loss of a loved one (especially by death)	something that causes great unhappiness
	intense sorrow caused by loss of a loved one (especially by death)