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

Class IV. Words Relating to the Intellectual Faculties
Division (II) Communication of Ideas
Section II. Modes of Communication

535. Affirmation.

   NOUN:AFFIRMATION, affirmance, statement, allegation, assertion, predication, predicate [logic], declaration, word, averment; confirmation.
  ASSEVERATION, adjuration, swearing, oath, affidavit; deposition (record) [See Record]; avouchment, avouch [rare], assurance; protest, protestation; profession; acknowledgment (assent) [See Assent]; legal pledge, pronouncement; solemn -averment, – avowal, – declaration.
  VOTE, voice; ballot, suffrage; vox populi [L.].
  REMARK, observation; position (proposition) [See Supposition]; saying, dictum, sentence, ipse dixit [L.].
  POSITIVENESS, emphasis, peremptoriness; dogmatism (certainty) [See Certainty]; weight.
  DOGMATIST [See Blusterer].
   VERB:ASSERT; make an assertion &c. n.; have one’s say; say, affirm, predicate, declare, state; protest, profess; acknowledge (assent) [See Assent].
  put forth, put forward; advance, allege, propose, propound; announce [See Information]; enunciate, broach, set forth, hold out, maintain, contend, pronounce, pretend.
  DEPOSE, depone, aver, avow, avouch, asseverate, swear, rap [archaic slang], affirm; make -, take one’s- oath; make -, swear -, put in- an affidavit; take one’s Bible oath, kiss the book, vow, vitam impendere vero [L.]; swear till -one is black in the face, – all’s blue [both colloq.]; be sworn, call Heaven to witness; vouch, warrant, certify, assure; swear by bell, book, and candle; attest (evidence) [See Evidence]; adjure &c. (put to one’s oath) [See Promise].
  EMPHASIZE; swear by (believe) [See Belief]; insist upon, take one’s stand upon; lay stress on; assert -roundly, – positively; lay down, – the law; raise one’s voice, dogmatize, have the last word; rap out; repeat; reassert, reaffirm.
   ADJECTIVE:AFFIRMATIVE; asserting &c. v.; declaratory, predicatory, predicative, predicational, pronunciatory, pronunciative, soi-disant [F.]; positive; unmistakable, clear; certain [See Certainty]; express, explicit (patent) [See Manifestation]; absolute, emphatic, flat, broad, round, pointed, marked, distinct, decided, assertive, insistent, confident, trenchant, dogmatic, definitive, formal, solemn, categorical, peremptory; unretracted.
  PREDICABLE, affirmable, attributable.
   ADVERB:AFFIRMATIVELY &c. adj.; in the affirmative.
  with emphasis, ex-cathedra, without fear of contradiction.
  I must say, indeed, i’ faith, let me tell you, why, give me leave to say, marry [archaic], you may be sure, I’d have you know; upon my -word, – honor; by my troth, egad [euphemism], I assure you; by jingo, by Jove, by George &c. [all colloq.]; troth, seriously, sadly [obs.]; in -, in sober- -sadness, – truth, – earnest; of a truth, truly, pardie or perdy [archaic]; in all conscience, upon oath; be assured (belief) [See Belief]; yes (assent) [See Assent]; I’ll -warrant, – warrant you, – engage, – answer for it, – be bound, – venture to say, – take my oath; in fact, forsooth, joking -aside, – apart; in all -soberness, – seriousness; so help me God; not to mince the matter.
  1. Quoth he.
  2. dixi.