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

Class I. Words Expressing Abstract Relations
Section II. Relation
3. Partial Relation

17. Similarity.

   NOUN:SIMILARITY, resemblance, likeness, similitude [rare], semblance, consimilarity [rare]; affinity, approximation, parallelism; agreement [See Agreement]; analogy, analogicalness; correspondence, homoiousia, parity.
  CONNATURALNESS, connature [rare], connaturality [rare]; brotherhood, family likeness.
  ALLITERATION, rime or rhyme, pun.
  REPETITION [See Repetition]; sameness (identity) [See Identity]; uniformity [See Uniformity]; isogamy.
  ANALOGUE; the like; match, pendant, fellow, companion, pair, mate, twin, double, congener, counterpart, brother, sister; one’s second self, alter ego [L.], chip of the old block, par nobile fratrum [L.], Arcades ambo [L.], birds of a feather, et hoc genus omne [L.]; gens de même famille [F.].
  SIMILE; parallel; type (metaphor) [See Metaphor]; image (representation) [See Representation]; photograph; close-, striking-, speaking-, faithful &c. adj. – – likeness, – resemblance.
   VERB:BE SIMILAR &c. adj.; look like, resemble, favor [colloq.], follow, echo, reproduce, bear resemblance; savor of, smack of; approximate; parallel, match, rime or rhyme with; take after; imitate [See Imitation]; span [U. S.]; hunt in couples, run in couples.
  RENDER SIMILAR &c. adj.; assimilate, approximate, bring near; connaturalize, make alike; rime or rhyme, pun.
   ADJECTIVE:SIMILAR; resembling &c. v.; like, alike; twin.
  ANALOGOUS, analogical; parallel, of a piece; such as, so; homoiousian.
  CONNATURAL, correlative, corresponding, cognate, congeneric, congenerous, allied to; akin to (consanguineous) [See Consanguinity].
  APPROXIMATE, much the same, near, close, something like, near- [as near-silk, colloq., U.S.], such like; a show of; mock, pseudo, simulating, representing.
  EXACT (true) [See Truth]; lifelike, faithful; true to nature, true to life; the very image of, the very picture of; for all the world like, comme deux gouttes d’eau [F.], as like as two peas, as like as it can stare; instar omnium [L.], cast in the same mold, ridiculously like.
   ADVERB:AS IF, so to speak; as it were, as if it were; quasi [L.], just as, veluti in speculum [L.].
  1. Et sic de similibus.
  2. Tel maître tel valet
  3. Tel père tel fils, like father like son.
  4. As lyke as one pease is to another.—Lyly
  5. They say we are Almost as like as eggs.—Winter’s Tale
  6. Fair Portia’s counterfeit.—Merchant of Venice
  7. So and no otherwise hill-men desire their hills.—Kipling