Synonyms for mandatory in English

Antonyms

• optional
• unnecessary
• voluntary
• nonessential
• nonbinding
• unwanted
• unneeded
• discretionary
• elective
• unforced
• non-binding
• non-compulsory
• non binding
• non-statutory
• soft
• non-committal
• non-essential
• empty
• against the rules
• uncontrolled
• non-prescription
• noncommittal
• unsought
• unenforceable
• unsolicited
• uncalled-for
• uncalled
• permissive
• out of order
• without prescription
• unrequired
• unessential
• optionally
• facultative
• pre-electoral
• no-obligation
• ...