composure

Plural: composures

Noun

• steadiness of mind under stress
  • "he accepted their problems with composure and she with equanimity"
• Calmness of mind or temperament
• The act of composing
• Something which is composed; a composition.
• Orderly adjustment; disposition.
• Frame; make; temperament.
• A combination; a union; a bond.

Synonyms

calm, calmness, equanimity, coolness, countenance, self-possession

Antonyms

discomposure