Synonyms for Noncompulsory:

• adj.

  •optional (adjective)
  • arbitrary,
  • free,
  • unforced,
  • elective,
  • up to the individual,
  • voluntary,
  • non-compulsory,
  • alternative,
  • discretional,
  • no strings attached,
  • unrestricted,
  • open,
  • discretionary,
  • volitional,
  • nonobligatory.
  •Other relevant words: (adjective)
  • unnecessary,
  • optional.
  •unnecessary (adjective)
  • casual,
  • extraneous,
  • fortuitous,
  • chance,
  • useless,
  • avoidable,
  • profuse,
  • causeless,
  • surplus,
  • beside the point,
  • unessential,
  • supererogatory,
  • haphazard,
  • futile,
  • extrinsic,
  • uncritical,
  • worthless,
  • Non-essential,
  • beside point,
  • undesirable,
  • exorbitant,
  • lavish,
  • uncalled-for,
  • nonessential,
  • wanton,
  • excess,
  • prodigal,
  • irrelevant.
  •unrequired (adjective)
  • un-required,
  • un required.

• Other synonyms:

  •Other relevant words (noun):
  • accidental,
  • extra,
  • additional,
  • strange,
  • redundant,
  • curious,
  • odd,
  • excessive,
  • extraordinary,
  • not required,
  • luxury,
  • funny,
  • singular,
  • abnormal,
  • unrequired,
  • gratuitous,
  • needless,
  • inessential,
  • unneeded,
  • droll,
  • random,
  • spare,
  • grotesque,
  • expendable,
  • complimentary,
  • facultative,
  • eccentric,
  • supplementary,
  • superfluous,
  • dispensable,
  • exceptional.

Paraphrases for Noncompulsory:

• Equivalence

  • Adjective
    non-obligatory.

• Independent

  • Adjective
    non-mandatory, compensatory, non-binding, non-compensatory.

Antonyms for Noncompulsory:

• adj.

  • inessential
    essential, designed, planned, careful.
  • optional
    required, forced, compulsory.
  • unnecessary
    valuable, necessary, worthwhile, needed, indispensable.
  • unneeded
    important.