difference

deviance, divergence

differentiability, discriminability, distinguishability

change, modification, variation

conflict, discord, discordance, dissension (also dissention), dissent, dissidence, disunity, friction, strife

variability, variance

anomalousness, dichotomy, incompatibility, incongruence, incongruity, incongruousness, nonconformity

disproportion, imbalance, inequality, nonequivalence

clash, collision, conflict, confliction, disaccord, discord, dissonance

apartness, divarication, division

combat, contention, strife, struggle

altercation, argument, bicker, falling-out, fight, kickup, misunderstanding, quarrel, set-to

amendment, correction, rectification, reform

conversion, deformation, distortion, metamorphosis, mutation, transfiguration, transformation

fluctuation, oscillation, shift

displacement, replacement, substitution

adjustment, modulation, regulation, tweak

redesign, redo