divergence, divergency -- (the act of moving away in different direction from a common point; "an angle is formed by the divergence of two straight lines")
deviation, divergence, departure, difference -- (a variation that deviates from the standard or norm; "the deviation from the mean")
divergence, divergency -- (an infinite series that has no limit)
discrepancy, disagreement, divergence, variance -- (a difference between conflicting facts or claims or opinions; "a growing divergence of opinion")