dullness

Dullness is a related term of depression.

As nouns the difference between dullness and depression

is that dullness is the quality of being slow to understand things while depression is depression (area that is lower than its surroundings).

Obscurity is a related term of dullness.

As nouns the difference between obscurity and dullness

is that obscurity is (label) darkness; the absence of light while dullness is the quality of being slow to understand things.

As nouns the difference between seriousness and dullness

is that seriousness is the state or quality of being serious while dullness is the quality of being slow to understand things.

Dullness is a related term of stupidity.

As nouns the difference between dullness and stupidity

is that dullness is the quality of being slow to understand things while stupidity is (uncountable) the property of being stupid.

Dullness is a related term of impassiveness.

As nouns the difference between dullness and impassiveness

is that dullness is the quality of being slow to understand things while impassiveness is the state of being impassive.

As nouns the difference between dullness and unfeelingness

is that dullness is the quality of being slow to understand things while unfeelingness is the state or condition of being unfeeling.

Dullness is a related term of melancholy.

As nouns the difference between dullness and melancholy

is that dullness is the quality of being slow to understand things while melancholy is (historical) black bile, formerly thought to be one of the four "cardinal humours" of animal bodies.

As an adjective melancholy is

affected with great sadness or depression.

As nouns the difference between gloom and dullness

is that gloom is darkness, dimness or obscurity while dullness is the quality of being slow to understand things.

As a verb gloom

is to be dark or gloomy.

Insensibility is a synonym of dullness.

As nouns the difference between insensibility and dullness

is that insensibility is the property of being insensible while dullness is the quality of being slow to understand things.

Dullness is a related term of weariness.

As nouns the difference between dullness and weariness

is that dullness is the quality of being slow to understand things while weariness is exhaustion, fatigue or tiredness.