insouciance

As nouns the difference between insouciance and cavalier

is that insouciance is carelessness, heedlessness, indifference, or casual unconcern while cavalier is a military man serving on horse.

As an adjective cavalier is

not caring enough about something important.

As a noun insouciance

is carelessness, heedlessness, indifference, or casual unconcern.

As an adjective indifferent is

not caring or concerned; uninterested, apathetic.

As an adverb indifferent is

to some extent, in some degree (intermediate between very and not at all); moderately, tolerably, fairly.

As nouns the difference between clamor and insouciance

is that clamor is a great outcry or vociferation; loud and continued shouting or exclamation while insouciance is carelessness, heedlessness, indifference, or casual unconcern.

As a verb clamor

is to cry out and/or demand.

As nouns the difference between insouciance and trifle

is that insouciance is carelessness, heedlessness, indifference, or casual unconcern while trifle is an English dessert made from a mixture of thick custard, fruit, sponge cake, jelly and whipped cream.

As a verb trifle is

to deal with something as if it were of little importance or worth.

As a noun insouciance is

carelessness, heedlessness, indifference, or casual unconcern.

As nouns the difference between insouciance and shamelessness

is that insouciance is carelessness, heedlessness, indifference, or casual unconcern while shamelessness is (uncountable) the state or characteristic of being shameless.

As an adjective impervious

is unaffected or unable to be affected by.

As a noun insouciance is

carelessness, heedlessness, indifference, or casual unconcern.

As nouns the difference between blitheness and insouciance

is that blitheness is the characteristic of being blithe while insouciance is carelessness, heedlessness, indifference, or casual unconcern.