variance

an event that departs from expectations

discord that splits a group

the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value

a difference between conflicting facts or claims or opinions; "a growing divergence of opinion"

the quality of being subject to variation

an official dispensation to act contrary to a rule or regulation (typically a building regulation); "a zoning variance"

an activity that varies from a norm or standard; "any variation in his routine was immediately reported"