heartbreak

As a noun heartbreak

is overwhelming mental anguish or grief, especially that caused by loss or disappointment.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between heartbreak and regret

is that heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment while regret is emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing.

As a verb regret is

to feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead.

As nouns the difference between sad and heartbreak

is that sad is grain; harvested seeds while heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment.

Heartbreak is a related term of despondency.

As nouns the difference between heartbreak and despondency

is that heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment while despondency is the loss of hope or confidence; despair or dejection.

Resentment is a related term of heartbreak.

As nouns the difference between resentment and heartbreak

is that resentment is a feeling of anger or displeasure stemming from belief that one has been wronged by others or betrayed; indignation while heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment.

Dejection is a related term of heartbreak.

As nouns the difference between dejection and heartbreak

is that dejection is dejection, defecation while heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment.

Aggravation is a related term of heartbreak.

As nouns the difference between aggravation and heartbreak

is that aggravation is the act of aggravating, or making worse; used of evils, natural or moral; the act of increasing in severity or heinousness; something additional to a crime or wrong and enhancing its guilt or injurious consequences while heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment.

Hell is a related term of heartbreak.

As a proper noun hell

is .

As a noun heartbreak is

overwhelming mental anguish or grief, especially that caused by loss or disappointment.

Chagrin is a related term of heartbreak.

As nouns the difference between chagrin and heartbreak

is that chagrin is distress of mind caused by a failure of aims or plans, want of appreciation, mistakes etc; vexation or mortification while heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment.

As a verb chagrin

is to bother or vex; to mortify.

Heartbreak is a related term of unhappiness.

As nouns the difference between heartbreak and unhappiness

is that heartbreak is overwhelming mental anguish or grief, especially that caused by loss or disappointment while unhappiness is the feeling of not being happy.