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

Class I. Words Expressing Abstract Relations
Section VIII. Causation
3. Power in Operation

174. Moderation.

   NOUN:MODERATION; lenity [See Lenity]; temperateness, temperance, passability, passableness, gentleness &c. adj.; sobriety; quiet; mental calmness (inexcitability) [See Inexcitability].
  MODERATING &c. v.; anaphrodisia; relaxation, remission, mitigation, tranquilization, assuagement, alleviation, contemporation [obs.], pacification.
  MEAN, measure, juste milieu [F.], golden mean, meden agan [Greek], ariston metron [Greek].
  MODERATOR; lullaby, sedative, calmative, lenitive, palliative, demulcent, antispasmodic, carminative; laudanum; rose water, balm, poppy, chloroform, opium: soothing sirup, opiate, anodyne, milk.
   VERB:BE MODERATE &c. adj.; keep within -bounds, – compass; sober down, settle down; keep the peace, remit, relent; take in sail.
  MODERATE, soften, mitigate, temper, accoy [obs.]; attemper, contemper [obs.], mollify, lenify [rare], dulcify, dull, take off the edge, blunt, obtund, sheathe, subdue, chasten; sober down, tone down, smooth down, slow down; weaken [See Weakness]; lessen (decrease) [See Nonincrease, Decrease]; check; palliate.
  TRANQUILLIZE, assuage, appease, suage or swage [dial.], lull, soothe, compose, still, calm, cool, quiet, hush, quell, sober, pacify, tame, damp, lay, allay, rebate [archaic], slacken, smooth, alleviate, rock to sleep, deaden, smother; throw cold water on, throw a wet blanket over; slake; curb (restrain) [See Restraint]; tame (subjugate) [See Subjection]; smooth over; pour oil on the -waves, – troubled waters; pour balm into; mettre de l’eau dans son vin [F.].
  go out like a lamb, “roar you as gently as any sucking dove” [M. N. D.].
   ADJECTIVE:MODERATE; lenient [See Lenity]; gentle, mild; cool, sober, temperate, reasonable, measured; tempered &c. v.; calm, unruffled, quiet, tranquil, still; slow, smooth, untroubled; tame; peaceful, peaceable; pacific, halcyon.
  UNEXCITING, unirritating; soft, bland, oily, demulcent, lenitive, anodyne; hypnotic [See Inactivity]; sedative, calmative, assuaging, assuasive, calmant; antiorgastic, anaphrodisiac.
  mild as mother’s milk, mild as milk, milk and water, gentle as a lamb.
   ADVERB:MODERATELY &c. adj.; gingerly; piano; under easy sail, at half speed, in moderation; within bounds, within compass; in reason.
  1. Est modus in rebus.—Horace
  2. Not poppy nor mandragora, Nor all the drowsy syrups of the world.—Othello