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

Class I. Words Expressing Abstract Relations
Section II. Relation
1. Absolute Relation

15. Difference.

   NOUN:DIFFERENCE; variance, variation, variety; diversity, divergence, heterogeneity, discongruity, contrast, inconformity, incompatibility, antithesis, antitheticalness, discrepation [rare], dissimilarity [See Dissimilarity]; disagreement [See Disagreement]; disparity (inequality) [See Inequality]; distinction, dissimilitude [rare], distinctness, contradiction, contradictoriness, contrariety, contradistinction; alteration.
  nice distinction, fine distinction, delicate distinction, subtle distinction; shade of difference, nuance [F.]; discrimination [See Discrimination]; differentia.
  DIFFERENT THING, something else, apple off another tree, another pair of shoes; this, that, or the other.
  MODIFICATION, commutation [rare], moods and tenses.
   VERB:BE DIFFERENT &c. adj.; differ, vary, ablude [obs.], mismatch, contrast; diverge from, depart from, deviate from, disaccord with, discrepate [rare]; divaricate; differ toto cælo [L.], differ longo intervallo [L.].
  VARY, modify (change) [See Change].
  DISCRIMINATE [See Discrimination].
   ADJECTIVE:DIFFERING &c. v.; different, diverse, heterogeneous; distinguishable; varied, variant, divergent, contrastive, incongruous, discrepant, dissonant, inharmonious, disparate, inconformable, differential, modified; diversified, various, divers [archaic], all manner of; variform [See Multiformity]; dædal.
  OTHER, another, not the same; unequal [See Inequality]; unmatched; widely apart.
  DISTINCTIVE, characteristic; discriminative, differentiative, distinguishing; diacritic, diacritical; diagnostic.
  1. Il y a fagots et fagots.
  2. Tot homines tot sententiæ
  3. A distinction without a difference.—Fielding
  4. You must wear your rue with a difference.—Hamlet
  5. But she is in her grave, and oh, The difference to me.—Wordsworth
  6. Not Lancelot, nor another.—Tennyson