Synonyms for Swellheadedness:

• n.

  •egoism (noun)
  • egotism.
  •egoism/egotism (noun)
  • insolence,
  • self-possession,
  • bragging,
  • self-confidence,
  • overconfidence,
  • vainglory,
  • presumption,
  • arrogance,
  • Vaunting,
  • assurance,
  • self-importance,
  • selfishness,
  • haughtiness,
  • conceit,
  • superiority,
  • ostentation,
  • pride,
  • gasconade,
  • vanity,
  • egocentricity,
  • boasting.
  •narcissism (noun)
  • ego,
  • amour-propre.
  •self-absorption (noun)
  • egocentrism.
  •self-centeredness (noun)
  • self centeredness,
  • selfcenteredness.
  •self-involvement (noun)
  • self involvement,
  • selfinvolvement.

• Other synonyms:

  •Other relevant words:
  • pridefulness,
  • pomposity,
  • Self-conceit,
  • self-glory,
  • Self-opinion,
  • pompousness,
  • self-esteem,
  • complacence,
  • vaingloriousness,
  • self-satisfaction,
  • smugness,
  • self-congratulation,
  • complacency,
  • self-assumption,
  • bighead.

Antonyms for Swellheadedness:

• n.

  • egoism
    modesty, timidity, shyness, meekness.
  • egoism/egotism
    humility, altruism, selflessness.
  • Other antonyms:
    humbleness, timidness, self-doubt, diffidence, unselfishness, self-disgust, passiveness, passivity, bashfulness, demureness.