COMPULSORY Antonyms There are 3 antonyms of the word compulsory. (opposite meanings)Did you mean?Definition of COMPULSORYAlso try opposite words for..compelcompellingcompulsorilyBest Opposite Words For COMPULSORYTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1optionaladjectiveadj2electivenoun, adjectiven, adj3voluntaryadjectiveadj Alternatives for OPTIONAL Words (6)alternativediscretionaryelectivevolitionalvoluntaryfacultativeOpposite words for optional Alternatives for ELECTIVE Words (13)alternatealternativechosendiscretionaryfreeoptionalselectivevolitionalvoluntarywillfulelectoralelectedfacultativePhrases (1)elective courseOpposite words for elective Alternatives for VOLUNTARY Words (20)discretionaryoptionalspontaneousunpaidelectivefreewillindependentself-imposedself-inducedunforcedunpromptedwillingautonomoushonoraryintentionalunsalariedvolitionalvolunteerwillfulunwagedPhrases (2)military volunteerpro bonoOpposite words for voluntary