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shenanigan
\shənanə̇gən, -anēg-\noun
(-s)
Etymology: origin unknown
1.
 a. : an often devious trick used especially to divert attention for an underhand purpose : deception, stratagem, fast one
  < a scamp who had pinched pennies out of the teacups of the poor by various shenanigans — W.A.White >
 b. : any act that is high-spirited, daring, or mischievous : prank, escapade
  < boys up to some shenanigan or other >
2.
 a. : tricky or questionable practices or conduct : humbug, fakery
  < febrile prosperity … founded on shenanigan — Yale Review >
  < the simplest business transaction today is enveloped in such a mantle of idiotic shenanigan — American Mercury >
  < revealed certain indications of shenanigan on the part of these judges — New York Sun >
  — usually used in plural
  < symbol of all the fraud and force and shenanigans and duress — W.A.White >
  < unfair shenanigans by a competitor — M.T.Bloom >
 b. : any high-spirited, daring, or mischievous activity : goings-on, high jinks, monkey business — usually used in plural
  < the shenanigans attending a supercolossal film production — Ilka Chase >
  < as soon as the usual parade shenanigans were over — Saul Bellow >
  < the raiders, after an hour or two of highly diverting shenanigans … during which they drew the wildest kind of inaccurate fire, retired — Walter Karig 

homeostasis
\ˌhōmēōˈstāsə̇s, ˌhäm-, -ˈstasəs; -mēˈästəsə̇s\noun
(-es)
Etymology: New Latin, from home- + -stasis
1. : a tendency toward maintenance of a relatively stable internal environment in the bodies of higher animals through a series of interacting physiological processes (as the maintenance of a fairly constant degree of body heat in the face of widely varying external temperatures)
2. : a tendency toward maintenance of a relatively stable psychological condition of the individual with respect to contending drives, motivations, and other psychodynamic forces
3. : a tendency toward maintenance of relatively stable social conditions among groups with respect to various factors (as food supply and population among animals) and to competing tendencies and powers within the body politic, to society, or to culture among men