Noun
variability [pl. variabilities]
fluctuation [pl. fluctuations]
change [pl. changes]
instability [pl. instabilities] , {psych.}
تقلب {علم نفس}
turning [pl. turnings]
rolling [pl. rollings] , {about}
unpredictability [pl. unpredictabilities]
moodiness {feelings & emotions}
vicissitude [pl. vicissitudes]
turnover [pl. turnovers]
Verb
to change [ changed ; changed ]
to fluctuate [ fluctuated ; fluctuated ]
to roll {about}
to toss {about}, [ tossed ; tossed ]
...
swing {ing}