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 II. Prospective Volition
2. Degree of Subservience

658. Improvement.

   NOUN:IMPROVEMENT, amelioration, melioration, betterment; mend, amendment, emendation; mending &c. v.; advancement; advance (progress) [See Progression]; ascent [See Ascent]; promotion, preferment; elevation [See Elevation]; increase [See Increase].
  CULTIVATION, culture, march of intellect, menticulture; race-culture, acculturation, civilization; culture zone; eugenics.
  REFORM, reformation; revision, radical reform; second thoughts, correction, limœ labor [L.], refinement, elaboration; purification [See Cleanness]; repair (res toration) [See Restoration]; recovery [See Restoration].
  REVISE, revised edition, new edition, new issue.
  REFORMER, reformist, progressive, radical.
   VERB:IMPROVE; be -, become -, get- better; mend, amend.
  advance (progress) [See Progression]; ascend [See Ascent]; increase [See Increase]; fructify, ripen, mature; pick up, come about, rally, take a favorable turn; turn over a new leaf, turn the corner; raise one’s head, have sown one’s wild oats; recover [See Restoration].
  PROFIT BY; be better &c. adj., be improved by; turn to -right, – good, – best- account; reap the benefit of; make good use of, make capital out of; place to good account.
  RENDER BETTER, improve, mend, amend, better; ameliorate, meliorate, relieve; correct; repair (restore) [See Restoration]; doctor (remedy) [See Remedy]; purify [See Cleanness]; decrassify.
  improve -, refine- upon; rectify; enrich, mellow, elaborate, fatten.
  REFRESH, revive; put -, infuse- new blood into; invigorate (strengthen) [See Strength]; reinvigorate, recruit, renew, make over, revivify, freshen.
  PROMOTE, cultivate, advance, forward, enhance; bring forward, bring on; foster [See Aid].
  TOUCH UP, rub up, brush up, furbish up, bolster up, vamp up, brighten up, warm up; polish, cook, make the most of, set off to advantage; prune; put in order (arrange) [See Arrangement].
  REVISE, edit, redact, digest, review, make corrections, make improvements &c. n.
  REFORM, remodel, reorganize; build -afresh, – anew; reclaim, civilize; lift, uplift, inspire; new-model.
  view in a new light, think better of, appeal from Philip drunk to Philip sober.
  PALLIATE, mitigate; lessen [See Nonincrease, Decrease] an evil.
   ADJECTIVE:BETTER, – off, – for; all the better for; better advised; improving &c. v.; progressive, improved &c. v.
  REFORMATORY, emendatory; reparatory (restorative) [See Restoration]; remedial [See Remedy].
  CORRIGIBLE, improvable, curable; accultural.
   ADVERB:ON CONSIDERATION, on reconsideration, on second thoughts, on better advice; on the mend, on the upgrade; ad melius inquirendum [L.].
  1. Urbem latericiam invenit marmoream reliquit.
  2. To look up and not down, to look forward and not back, to look out and not in, and to lend a hand.—Hale