Open English Wordnet
Nouns
(n)divergence, divergencythe act of moving away in different direction from a common point“an angle is formed by the divergence of two straight lines”
(n)deviation, divergence, departure, differencea variation that deviates from the standard or norm“the deviation from the mean”
(n)discrepancy, disagreement, divergence, variancea difference between conflicting facts or claims or opinions“a growing divergence of opinion”