Synonyms of discretionary
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arbitraryIf you describe an action, rule, or decision as arbitrary, you think that it is not based on any principle, plan, or system. It often seems unfair because of this.
• Arbitrary arrests were common.
optionalIf something is optional, you can choose whether or not you do it or have it.
• Some people feel sex education should remain an optional school subject.
Thesaurus for discretionary from the Collins English Thesaurus