Synonyms for Mirthfulness:

• n.

  •
  • gaiety,
  • jollity,
  • laughter,
  • merriment.
  •blitheness (noun)
  • carefreeness.
  •blithesomeness (noun)
  • cheerinesses,
  • lightsomenesses.
  •gaiety (noun)
  • festivity,
  • joyousness,
  • joie de vivre,
  • elation,
  • gleefulness,
  • entertainment,
  • pleasantness,
  • geniality,
  • liveliness,
  • colorfulness,
  • Reveling,
  • frolic,
  • revel,
  • brilliance,
  • glitter,
  • brightness,
  • sparkle,
  • glee,
  • grins,
  • mirth,
  • radiance,
  • good humor,
  • gladness,
  • merrymaking,
  • cheer,
  • conviviality,
  • showiness,
  • exhilaration,
  • whoopee,
  • wingding,
  • effervescence,
  • animation,
  • sport,
  • sprightliness,
  • vivacity,
  • high spirits,
  • fun,
  • hilarity,
  • revelry,
  • shindig,
  • color.
  •jocoseness (noun)
  • wingdings.

• Other synonyms:

  •
  • jocosity,
  • lightheartedness.
  •
  • joy.
  •Other relevant words:
  • Frolicking,
  • frivolity,
  • bliss,
  • exuberance,
  • amusement,
  • enjoyment,
  • rapture,
  • jauntiness,
  • delight,
  • cheerfulness,
  • rejoicing,
  • levity,
  • gloating,
  • jubilation,
  • hilariousness,
  • blithefulness,
  • Gamesomeness,
  • buoyancy,
  • joyfulness,
  • pleasure,
  • satisfaction,
  • felicity,
  • exultation,
  • Light-heartedness,
  • happiness,
  • gayness,
  • gloat,
  • schadenfreude,
  • good spirits.

Antonyms for Mirthfulness:

• n.

  • gaiety
    unhappiness, sadness, sorrow, discouragement, work, gloom, depression, dullness, seriousness.
  • Other antonyms:
    dolefulness, woe, sourness, grimness, glumness, Desolateness, graveness, soberness, gloominess, dolorousness, gravity, melancholy, woefulness, mourning, Miserableness, joylessness, forlornness, spleen, misery, darkness, plaintiveness, earnestness, despondence, solemnity, bile, sobersidedness, desolation, wretchedness, Solemnness, dejection, disgruntlement, blackness, heartbreak, blues, discontent, moodiness, mournfulness.