Synonyms for Lightheartedness:

• n.

  •
  • jollity,
  • glee,
  • merriment,
  • laughter,
  • hilarity.
  •abandon (noun)
  • abandonment.
  •abandonment (noun)
  • wildness.
  •blitheness (noun)
  • carefreeness.
  •blithesomeness (noun)
  • lightsomenesses.
  •cheer (noun)
  • Cheeriness,
  • good cheer,
  • joyousness,
  • merriments,
  • exuberance,
  • jauntiness,
  • merry-making,
  • hopefulness.
  •cheerfulness (noun)
  • bonhomie,
  • complaisance,
  • amiability,
  • buoyancy,
  • friendliness,
  • sunniness,
  • geniality,
  • congeniality,
  • pleasance,
  • warmness,
  • agreeableness,
  • cordiality,
  • easygoingness,
  • affability,
  • cheerfulness,
  • good humor.
  •frivolity (noun)
  • non senses,
  • triflings,
  • toyings,
  • non-sense,
  • non sense,
  • fribbles,
  • dallyings,
  • coquettings,
  • shallownesses,
  • flummeries,
  • non-senses,
  • frivolousnesses.
  •gaiety (noun)
  • revelings,
  • colorfulnesses,
  • whoopees,
  • showinesses,
  • high spiritses.
  •happiness (noun)
  • peace mind,
  • well being,
  • wellbeings.
  •high spirits (noun)
  • Jeu D'esprit,
  • ebullience,
  • sprightliness,
  • nonchalance,
  • euphoria.
  •insouciance (noun)
  • insouciance.
  •joie de vivre (noun)
  • mollinesses,
  • gladsomenesses,
  • spiritednesses.
  •levity (noun)
  • fickleness,
  • facetiousness,
  • repartee.
  •mirth (noun)
  • hysteric,
  • hysterics.
  •playfulness (noun)
  • sportiveness,
  • waggishness.

• Other synonyms:

  •
  • gleefulness,
  • jocosity.
  •Other relevant words:
  • bounce,
  • nimbleness,
  • giddiness,
  • resilience,
  • gladness,
  • pertness,
  • intoxication,
  • quickness,
  • dexterity,
  • abandon,
  • airiness,
  • unrestraint,
  • brightness,
  • ease,
  • agility,
  • legerity,
  • Good Humour,
  • perkiness,
  • naturalness,
  • uninhibitedness,
  • joy,
  • lightness,
  • triviality,
  • enlivenment,
  • dizziness,
  • spell,
  • playfulness,
  • lightheadedness,
  • trivia,
  • alacrity,
  • indifference,
  • flippancy,
  • joie de vivre.

Antonyms for Lightheartedness:

• n.

  • high spirits
    gloom, depression, heavyheartedness.
  • Other antonyms:
    discipline, self-restraint, embarrassment, carefulness, suppression, heedfulness, discreetness, self-mastery, restraint, reserve, inhibition, self-control, self-consciousness, uneasiness, repression, self-denial, constraint, willpower, discretion, self-command, self-discipline, reticence.