Synonyms of self-possession in English:

self-possession


See US English definition of self-possession

See UK English definition of self-possession

See Spanish definition of serenidad

noun

1‘she had recovered her usual self-possession’

SYNONYMS
composure, assurance, self-assurance, self-control, calmness, coolness, cool head
ease, tranquillity, serenity, imperturbability, impassivity, equanimity, nonchalance, confidence, self-confidence, sureness, poise, dignity, aplomb, presence of mind, nerve, sangfroid, countenance, collectedness, suaveness, urbanity, elegance
informal cool, unflappability
ANTONYMS

nervousness