Synonyms: discretional, discretionary
Definition: having or using the ability to act or decide according to your own discretion or judgment
Usage: The commission has discretionary power to award extra funds
Similar words: arbitrary
Definition: based on or subject to individual discretion or preference or sometimes impulse or caprice
Usage: an arbitrary decision; the arbitrary rule of a dictator; an arbitrary penalty; of arbitrary size and shape; an arbitrary choice; arbitrary division of the group into halves