10 letters · 14 points in Scrabble
noun unstable flow of a liquid or gas
noun instability in the atmosphere
noun a state of violent disturbance and disorder (as in politics or social conditions generally)
originFrom Middle English turbulence (“turbidity, cloudiness”), from Late Latin turbulentia (“trouble, disquiet”). By surface analysis, turbulent + -ence.
Etymology from Wiktionary, CC BY-SA 3.0