Antonyms of turmoil:
order, orderliness, calm, ease, peace, peacefulness, quiet, tranquillity, hush, quietude, rest, stillness.
Examples of usage:
  1. But the turmoil of battle found a master.
    "Stonewall Jackson And The American Civil War", G. F. R. Henderson.
  2. She was forced to keep a quiet face and sit obediently mending her difficult piece of lace; and the child's heart was in great turmoil.
    "Opportunities", Susan Warner.
  3. Bobby's anger was lost in the increased confusion of his senses, but through that mental turmoil tore the thought of Graham and his intention of going to the Cedars.
    "The Abandoned Room", Wadsworth Camp.