Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class VI. Words Relating to the Sentient and Moral Powers
Section II. Personal Affections
1. Passive Affections

836. Cheerfulness.

   NOUN:CHEERFULNESS &c. adj.; geniality, gayety, L’Allegro [It.], cheer, good humor, spirits; high spirits, animal spirits, flow of spirits; glee, high glee, light heart; sunshine of the -mind, – breast; gaieté de cæur [F.], bon naturel [F.].
  LIVELINESS &c. adj.; life, alacrity, vivacity, animation, allégresse [F.]; jocundity, joviality, jollity; levity; jocularity (wit) [See Wit].
  MIRTH, merriment, hilarity, exhilaration; laughter [See Rejoicing]; merrymaking (amusement) [See Amusement]; heyday, rejoicing [See Rejoicing]; marriage bell.
  nepenthe or nepenthes, lotus; Euphrosyne.
  OPTIMISM (hopefulness) [See Hope]; self- complacency; hedonics, hedonism.
   VERB:BE CHEERFUL &c. adj.; have the mind at ease, smile, put a good face upon, keep up one’s spirits; view the bright side of the picture, view things en couleur de rose [F.]; look through rose- colored spectacles; ridentem dicere verum [L.], cheer up, brighten up, light up, bear up; take heart, cast away care, drive dull care away, perk up; keep a stiff upper lip [slang].
  REJOICE &c.; 838; carol, chirp, chirrup, lilt; frisk, rollic, give a loose to mirth [obs.].
  CHEER, enliven, elate, exhilarate, gladden, inspirit, animate, raise the spirits, inspire; put in good humor; cheer -, rejoice- the heart; delight &c. (give pleasure) [See Pleasurableness].
   ADJECTIVE:CHEERFUL; happy [See Pleasure]; cheery, of good cheer, smiling; blithe; in spirits, in good spirits; breezy, bully [slang], chipper [colloq., U. S.]; in high -spirits, – feather; happy as -the day is long, – a king; gay, gay as a lark; allegro [It.]; debonair or debonaire, light, lightsome, lighthearted; buoyant, bright, free and easy, airy; jaunty or janty, rollicky [colloq.], canty [Scot. & dial. Eng.], “crouse an’ canty” [Burns]; hedonic; riant; sprightly, sprightful; spry; spirited, spiritful [rare], lively, animated, vivacious; brisk, – as a bee; sparkling; sportive; full of -play, – spirit; all alive.
  sunny, palmy; hopeful [See Hope].
  MERRY, – as a -cricket, – grig, – marriage bell; joyful, joyous, jocund, jovial; jolly, – as a thrush, – as a sand-boy; blithesome; gleeful, gleesome; hilarious, rattling [colloq.].
  WINSOME, bonny, hearty, buxom.
  PLAYFUL, playsome; folâtre [F.], playful as a kitten, tricksy, frisky, frolicsome; gamesome; jocose, jocular, waggish; mirth-loving, laughter-loving, abderian; mirthful, rollicking.
  ELATE, elated; exulting, jubilant, flushed; rejoicing [See Rejoicing]; cock-a-hoop.
  CHEERING, inspiriting, exhilarating; cardiac or cardiacal; pleasing [See Pleasurableness]; palmy, flourishing, halcyon.
   ADVERB:CHEERFULLY &c. adj.; cheerily, with good cheer; with a cheerful &c. heart; with relish, with zest; on the crest of the wave.
   INTERJECTION:NEVER SAY DIE! come! cheer up! hurrah! [See Rejoicing]; “hence loathed melancholy!” begone dull care! away with melancholy!    QUOTATIONS:
  1. A merry heart goes all the day.—A Winter’s Tale
  2. As merry as the day is long.—Much Ado
  3. Ride si sapis.—Martial
  4. As merry as cards, suppers, wine, and old women can make us.—Goldsmith