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

651. Imperfection.

   NOUN:IMPERFECTION; imperfectness &c. adj.; deficiency; inadequacy (insufficiency) [See Insufficiency]; peccability, defection, peccancy (badness) [See Badness]; immaturity [See Nonpreparation].
  FAULT, defect, “little rift within the lute” [Tennyson], weak point; screw loose; flaw (break) [See Discontinuity]; gap [See Interval]; twist [See Distortion]; taint, attainder; mésalliance [F.], bar sinister; hole in one’s coat; blemish [See Blemish]; weakness [See Weakness]; shortcoming [See Shortcoming]; drawback; seamy side.
  HALF BLOOD, drop of black blood, touch of the tar-brush [colloq.].
  MEDIOCRITY; no great -shakes, – catch [both colloq.]; not much to boast of; one-horse shay; one-horse town; peanut -politics, – policy.
   VERB:BE IMPERFECT &c. adj.; rot before it ripens, bear within it the seeds of decay; have a defect &c. n.; lie under a disadvantage; spring a leak.
  not pass muster, barely pass muster; fall short [See Shortcoming].
   ADJECTIVE:IMPERFECT; not perfect [See Perfection]; deficient, defective; faulty, unsound, tainted, specked; mutilated; out of order; out of tune, cracked; leaky; sprung; warped (distort) [See Distortion]; lame; injured (deteriorated) [See Deterioration]; peccant (bad) [See Badness]; frail (weak) [See Weakness]; inadequate (insufficient) [See Insufficiency]; crude (unprepared) [See Nonpreparation]; incomplete [See Incompleteness]; found wanting; below par; short-handed; below -, under- its full -strength, – complement.
  INDIFFERENT, middling, ordinary, mediocre; average [See Mean]; soso or so-so; couci-couci [F.], milk-and-water; tolerable, fair, passable; pretty -well, – good; rather -, moderately- good; good -, well- enough; decent; not bad, not amiss; unobjectionable, admissible, bearable, better than nothing.
  SECONDARY, inferior; second-rate, second best; one-horse [U. S.]; two-by-four [U. S.].
   ADVERB:ALMOST &c.; to a limited extent, rather [See Smallness]; pretty, moderately; only, considering, all things considered, enough; might be worse.
  1. Surgit amari aliquid.
  2. With all my imperfections on my head.—Hamlet
  3. Frailty, thy name is woman.—Hamlet