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
2. Discriminative Affections

855. Affectation.

   NOUN:AFFECTATION; affectedness &c. adj.; acting a part &c. v.; pretense (falsehood) [See Falsehood], (ostentation) [See Ostentation]; boasting [See Boasting]; charlatanism, quackery, shallow profundity.
  pretension, airs, pedantry, pedantism, purism, precisianism, stiffness, formality, buckram; prunes and prisms; euphuism; teratology (altiloquence) [See Ornament].
  prudery, demureness, mock modesty, minauderie [F.], sentimentalism; mauvaise honte [F.], false shame.
  mannerism, simagrée [F.], grimace.
  FOPPERY, dandyism, man millinery, coxcombry, coquetry, puppyism, conceit.
  AFFECTER or affector, performer, actor; pedant, pedagogue, doctrinaire, purist, euphuist, mannerist; grimacier [rare]; lump of affectation, précieuse ridicule [F.], bas bleu [F.], blue stocking, poetaster; prig; charlatan (deceiver) [See Deceiver]; petit maître [F.] (fop) [See Fop]; flatterer [See Flatterer]; coquette, prude, puritan, precisian, formalist.
   VERB:AFFECT, act a part, put on; give oneself airs (arrogance) [See Insolence]; boast [See Boasting]; coquet; simper, mince, attitudinize, pose; flirt a fan; languish; euphuize; overact, overdo.
   ADJECTIVE:AFFECTED, full of affectation, pretentious, pedantic, stilted, stagy, theatrical, big-sounding, ad captandum [L.]; canting, insincere; not natural, unnatural; self-conscious; mannered, maniéré [F.]; artificial; overwrought, overdone, overacted; euphuistic [See Ornament].
  STIFF, starch, formal, prim, smug, demure, tiré à quatre épingles [F.], quakerish, puritanical, prudish, pragmatical.
  PRIGGISH, conceited, coxcomical, foppish, dandified, finical, finicking or finicky or finikin; mincing, simpering, namby-pamby, sentimental, languishing.
   QUOTATION:Conceit in weakest bodies strongest works.—Hamlet