Synonyms for Deviation (same or very similar meaning)
WordNet sense 1 (a variation that deviates from the standard or norm):
departure, difference, divergenceWordNet sense 2 (deviate behavior):
devianceWordNet sense 3 (a turning aside (of your course or attention or concern)):
deflection, digression, diversion, divagation, deflexionFrom the ODE community, based on WordNetadd/edit