unhappiness

As nouns the difference between unhappiness and null

is that unhappiness is the feeling of not being happy while null is zero, nil; the cardinal number before einn.

Unhappiness is a related term of regret.

As nouns the difference between unhappiness and regret

is that unhappiness is the feeling of not being happy 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 unhappiness and despair

is that unhappiness is the feeling of not being happy while despair is loss of hope; utter hopelessness; complete despondency.

As a verb despair is

(obsolete) to give up as beyond hope or expectation; to despair of.

As a noun unhappiness

is the feeling of not being happy.

As a verb dispair is

to separate (a pair).

Unhappiness is a related term of mishap.

As nouns the difference between unhappiness and mishap

is that unhappiness is the feeling of not being happy while mishap is an accident, mistake, or problem.

Bother is a related term of unhappiness.

As nouns the difference between bother and unhappiness

is that bother is fuss, ado while unhappiness is the feeling of not being happy.

As a verb bother

is to annoy, to disturb, to irritate.

As an interjection bother

is a mild expression of annoyance.

Unhappiness is a related term of evil.

As nouns the difference between unhappiness and evil

is that unhappiness is the feeling of not being happy while evil is moral badness; wickedness; malevolence; the forces or behaviors that are the opposite or enemy of good.

As an adjective evil is

intending to harm; malevolent.

Calamity is a synonym of unhappiness.

As nouns the difference between calamity and unhappiness

is that calamity is an event resulting in great loss while unhappiness is the feeling of not being happy.

Unhappiness is a related term of travail.

As nouns the difference between unhappiness and travail

is that unhappiness is the feeling of not being happy while travail is (archaic) arduous or painful exertion; excessive labor, suffering, hardship.

As a verb travail is

to toil.