composure

As nouns the difference between composure and serenity

is that composure is calmness of mind or matter, self-possession while 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 nouns the difference between composure and tranquility

is that composure is calmness of mind or matter, self-possession while tranquility is .

Cheerfulness is a related term of composure.

As nouns the difference between cheerfulness and composure

is that cheerfulness is the state of being cheerful; joy while composure is calmness of mind or matter, self-possession.

As nouns the difference between apex and composure

is that apex is the highest point of something while composure is calmness of mind or matter, self-possession.

As nouns the difference between patience and composure

is that patience is the quality of being patient while composure is calmness of mind or matter, self-possession.

As a proper noun Patience

is {{given name|female|from=English}}.

Restraint is a related term of composure.

As nouns the difference between restraint and composure

is that restraint is (countable) something that restrains, ties, fastens or secures while composure is calmness of mind or matter, self-possession.

As a noun composure

is calmness of mind or matter, self-possession.

As an adjective placid is

serene; calm.

Resignation is a related term of composure.

As nouns the difference between resignation and composure

is that resignation is resignation (state of uncomplaining frustration) while composure is calmness of mind or matter, self-possession.

As nouns the difference between composture and composure

is that composture is compost, composted manure while composure is calmness of mind or matter, self-possession.