Synonyms for Not good enough:

• adj.

  •unsatisfactory (adjective)
  • distressing,
  • disconcerting,
  • unacceptable,
  • junky,
  • bad,
  • deficient,
  • rotten,
  • weak,
  • disturbing,
  • wrong,
  • thin,
  • schlocky,
  • poor,
  • second,
  • vexing,
  • upsetting,
  • amiss,
  • offensive,
  • damaged,
  • unwelcome,
  • undesirable,
  • regrettable,
  • disquieting,
  • mediocre,
  • lame,
  • unsuitable.
  •unworthy (adjective)
  • good-for-nothing,
  • unbecoming,
  • unseemly,
  • blamable,
  • degrading,
  • not fit,
  • inexcusable,
  • disgraceful,
  • unmerited,
  • reprehensible,
  • valueless,
  • inappropriate,
  • recreant,
  • unfit,
  • base,
  • shameful,
  • vile,
  • no-good,
  • out of place,
  • undeserving,
  • no-account,
  • unbefitting,
  • not worth,
  • wretched,
  • contemptible,
  • ineligible,
  • dishonorable,
  • ignoble,
  • improper,
  • nothing,
  • disreputable,
  • beneath,
  • not deserving.
  •wanting (adjective)
  • cut off,
  • patchy,
  • failing,
  • needed,
  • minus,
  • empty,
  • devoid,
  • sketchy,
  • scarce,
  • inferior,
  • half-baked,
  • bankrupt,
  • away,
  • missing,
  • shy,
  • bereft,
  • faulty,
  • deprived,
  • absent,
  • imperfect,
  • short,
  • scant,
  • cooked,
  • less,
  • Omitted,
  • unsound,
  • incomplete,
  • burned out,
  • scanty,
  • gone,
  • defective,
  • destitute.

• n.

  •inferior (noun)
  • substandard.

• Other synonyms:

  •Other relevant words:
  • displeasing,
  • unsatisfying,
  • insufficient,
  • disappointing,
  • incommensurate,
  • inadequate.

Antonyms for Not good enough:

• adj.

  • unsatisfactory
    adequate, ok, suitable, acceptable, sufficient, satisfactory.
  • unworthy
    proper, qualified, appropriate, valuable, worthwhile, honorable, useful, worthy.
  • wanting
    existing, enough, perfect, present.