"turbulence" in the noun sense
1. turbulence, turbulency
unstable flow of a liquid or gas
2. turbulence
instability in the atmosphere
3. turbulence, upheaval, Sturm und Drang
a state of violent disturbance and disorder (as in politics or social conditions generally
"the industrial revolution was a period of great turbulence"
Source: WordNet® (An amazing lexical database of English)
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