silliness

In uncountable|lang=en terms the difference between silliness and goofiness

is that silliness is (uncountable) that which is perceived as silly or frivolous while goofiness is (uncountable) goofy behaviour.

In countable|lang=en terms the difference between silliness and goofiness

is that silliness is (countable) an act that is silly; a result of being silly while goofiness is (countable) the result or product of being goofy.

As nouns the difference between silliness and goofiness

is that silliness is (uncountable) that which is perceived as silly or frivolous while goofiness is (uncountable) the state of being goofy.

Silliness is a related term of balderdash.

As nouns the difference between silliness and balderdash

is that silliness is (uncountable) that which is perceived as silly or frivolous while balderdash is senseless talk or writing; nonsense.

As a verb balderdash is

(archaic) to mix or adulterate.

Indiscretion is a related term of silliness.

As nouns the difference between indiscretion and silliness

is that indiscretion is indiscretion while silliness is (uncountable) that which is perceived as silly or frivolous.

As nouns the difference between silliness and stupid

is that silliness is (uncountable) that which is perceived as silly or frivolous while stupid is a stupid person; a fool.

As an adjective stupid is

lacking in intelligence or exhibiting the quality of having been done by someone lacking in intelligence.

As an adverb stupid is

(slang|dated) extremely.

Silliness is a related term of trash.

As nouns the difference between silliness and trash

is that silliness is (uncountable) that which is perceived as silly or frivolous while trash is (chiefly|us) useless things to be discarded; rubbish; refuse.

As a verb trash is

(us) to discard.

In uncountable terms the difference between silliness and stupidity

is that silliness is that which is perceived as silly or frivolous while stupidity is the property of being stupid.

In countable terms the difference between silliness and stupidity

is that silliness is an act that is silly; a result of being silly while stupidity is an act that is stupid.

As nouns the difference between foolhardiness and silliness

is that foolhardiness is the quality of being foolhardy while silliness is that which is perceived as silly or frivolous.

Silliness is a related term of lunacy.

As nouns the difference between silliness and lunacy

is that silliness is (uncountable) that which is perceived as silly or frivolous while lunacy is (of a person or group of people) the state of being mad, insanity.

In uncountable terms the difference between silliness and craziness

is that silliness is that which is perceived as silly or frivolous while craziness is the state of being broken down or weakened; as, the craziness of a ship, or of the limbs.

In countable terms the difference between silliness and craziness

is that silliness is an act that is silly; a result of being silly while craziness is the result or product of being crazy.

Extravagance is a related term of silliness.

As nouns the difference between extravagance and silliness

is that extravagance is excessive or superfluous expenditure of money while silliness is (uncountable) that which is perceived as silly or frivolous.