Synonyms of imperturbability

2 Syllables
poise, coolness, sang-froid, aplomb
3 Syllables
self-command, steadfastness, self-control, patience
4 Syllables
ataraxy, nonchalance, composure, stability, tranquility, collectedness, self-possession
5 Syllables
self-composure, levelheadedness, equanimity, nonresistance, imperturbation, longanimity, equanimities
6 Syllables
unflappability, imperturbableness
7 Syllables
inexcitability