Synonyms for Unfulfillment:

• n.

  •disappointment (noun)
  • dissatisfaction,
  • failure.
  •frustration (noun)
  • resentment.

• Other synonyms:

  •
  • Noncompletion.
  •Other relevant words:
  • nonaccomplishment,
  • cold comfort,
  • ill humor,
  • petulance,
  • nonfeasance,
  • neglect,
  • Ill Humour,
  • unpleasure,
  • restlessness,
  • nonperformance,
  • Nonexecution,
  • uneasiness,
  • omission,
  • unhappiness,
  • nonachievement,
  • envy,
  • sourness.

Antonyms for Unfulfillment:

• n.

  • disappointment
    boost, achievement, delight, triumph, euphoria, encouragement, success, satisfaction, wonder, miracle, attainment, comfort, relief, pleasure, contentedness, blessing, win, happiness, boon, aid, help.
  • frustration
    facilitation, assistance, promotion, support, advance, cooperation.