Disturbance
Part of speech: noun
Definition: The act of disturbing, being disturbed Something that disturbs An interruption of that which is normal or regular. A serious mental imbalance or illness.
Example sentence: Bayern fulfilled every wish, no matter what Guardiola wanted: the players, the coaches, and even the doctors. He caused much disturbance off the field. But he is one of the best coaches on the planet.
Perturbation
Part of speech: noun
Definition: Agitation; the state of being perturbedA small change in a physical system, or more broadly any definable system (such as a biological or economic system)Variation in an orbit due to the influence of external bodies