Same word as vary:

alter, alternate, assort, be unlike, blow hot and cold, convert, depart, deviate, differ, digress, disagree, displace, dissent, divaricate, diverge, diversify, divide, fluctuate, hem and haw, inflect, interchange, modify, mutate, part, permutate, range, separate, shilly-shally, swerve, take turns, transform, turn, variegate, yo-yo