1) Chaos 2) Countercurrent 3) Crosscurrent 4) Excitability 5) Ferment 6) Riptide 7) Tempest 8) Tempestuousness 9) Turbulency 10) Unrest 11) Upheaval 12) Uproar 13) Violence 1) Chaos theory 2) Concept in physics 3) Conflict 4) Disorder 5) Disturbances 6) Disturbed state 7) Espionage project 8) Fighting 9) Flow regime 10) Instability 11) Instability in the atmosphere 12) National Security Agency 13) Physical phenomenon 14) Strife 15) Trouble 16) Turbulency 17) Turmoil 18) Violent disorder or commotion 
Disrupted flow in the atmosphere that produces gusts and eddies.
• (n.) The quality or state of being turbulent; a disturbed state; tumult; disorder; agitation.
random variations in velocity within a liquid or gaseous medium which may induce heterogeneous values of certain characteristics of the medium, such as refractive index
Describes fluid motion disturbed from its average behavior by random fluctuations over a range of temporal and spatial scales. 
<radiobiology> Violent macroscopic fluctuations which can develop under certain conditions in fluids and plasmas and which usually result in the rapid transfer of energy through the medium. ... (09 Oct 1997) ... 
Disrupted flow in the atmosphere that produces gusts and eddies. At times this can be violent and can cause the up and down movement of a plane.(Of the atmosphere) Quality or state in which the air flow at a given point changes constantly in velocity and direction (contrasted with laminar flow).
being uncontrolled violent 
irregular, disturbed or apparently chaotic movement of water or air
A warning issued when sustained winds of 39 to 73 miles per hour (34 to 63 knots) are expected within 24 hours.
A disorderly flow of air; turbulence may interfere with smooth airflow over a bird's wings and thus may disrupt flight.
Describes fluid motion disturbed from its average behaviour by random fluctuations over a range of temporal and spatial scales. See also: Aerodynamic Noise.
upheaval noun a state of violent disturbance and disorder (as in politics or social conditions generally); `the industrial revolution was a period of great turbulence`
Disturbed fluid. Can cause cavitation problems in a centrifugal pump. Often caused by an elbow located too close to the pump suction inlet.
The changes in wind speed and direction, frequently caused by obstacles.
The result of the disruption of airflow caused by an interruption to its passage, such as when it hits a rear wing and its horizontal flow is spoiled.
the quality or state of being turbulent; violent disorder or commotion. · the haphazard secondary motion caused by eddies within a moving fluid. · irregular motion of the atmosphere, as that indicated by gusts and lulls in the wind.
Rough air encountered by race car drivers.
instability in the atmosphere[PSAT glossary] instability in the atmosphere a state of violent disturbance and disorder[Difficult words] a state of violent disturbance and disorder