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

Class V. Words Releasing to the Voluntary Powers
Division (I) Individual Volition
Section I. Volition in General
1. Acts of Volition

608. Caprice.

   NOUN:CAPRICE, fancy, humor; whim, whimsey or whimsy, whim-wham, crotchet, capriccio [It.], quirk, freak, maggot, fad, vagary, prank, fit, flimflam, escapade, boutade [obs.], wild-goose chase; capriciousness &c. adj.; kink.
   VERB:BE CAPRICIOUS &c. adj.; have a maggot in the brain; take it into one’s head, take the bit in one’s teeth; strain at a gnat and swallow a camel; blow hot and cold; play fast and loose, play fantastic tricks; tourner casaque [F.].
   ADJECTIVE:CAPRICIOUS; erratic, eccentric, fitful, hysterical; full of whims &c. n.; maggoty; inconsistent, fanciful, fantastic, whimsical, crotchety, kinky [U. S.], particular, humorsome, freakish, skittish, wanton, wayward; contrary; captious; unreasonable, unrestrained, undisciplined, not amenable to reason, arbitrary; unconformable [See Unconformity]; penny wise and pound foolish; fickle (irresolute) [See Irresolution]; frivolous, sleeveless [obs.], giddy, volatile.
   ADVERB:BY FITS, by fits and starts, without rime or reason, at one’s own sweet will; without counting the cost.
  1. Nil fuit unquam sic impar sibi.
  2. The deuce is in him.