nonchalant

As adjectives the difference between nonchalant and reasonable

is that nonchalant is casually calm and relaxed while reasonable is having the faculty of reason; endued with reason; rational.

As adjectives the difference between nonchalant and laidback

is that nonchalant is casually calm and relaxed while laidback is an alternative spelling of lang=en.

As adjectives the difference between overzealous and nonchalant

is that overzealous is too zealous; too enthusiastic, determined; too fervent while nonchalant is casually calm and relaxed.

As a noun serenity

is the state of being serene; calmness; peacefulness.

As a proper noun Serenity

is {{given name|female|from=English}} in general use since the 1990s.

As an adjective nonchalant is

casually calm and relaxed.

As adjectives the difference between nonchalant and unperturbed

is that nonchalant is casually calm and relaxed while unperturbed is not perturbed.

As adjectives the difference between nonchalant and reluctant

is that nonchalant is casually calm and relaxed while reluctant is opposing; offering resistance (to).

As a verb placate

is to calm; to bring peace to; to influence someone who was furious to the point that he or she becomes content or at least no longer irate.

As an adjective nonchalant is

casually calm and relaxed.

As adjectives the difference between nonchalant and confident

is that nonchalant is casually calm and relaxed while confident is very sure of something; positive.

As a noun confident is

obsolete form of lang=en.

As adjectives the difference between reckless and nonchalant

is that reckless is careless or heedless; headstrong or rash while nonchalant is casually calm and relaxed.

As adjectives the difference between uncharitable and nonchalant

is that uncharitable is not charitable while nonchalant is casually calm and relaxed.