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

Class IV. Words Relating to the Intellectual Faculties
Division (I) Formation of Ideas
Section V. Results of Reasoning

493. Ignoramus.

   NOUN:IGNORAMUS, illiterate, dunce, duffer, woodenhead [colloq.], bonehead [slang], solid ivory [slang], numskull [colloq.], wooden spoon [Cambridge Univ., Eng., cant]; no scholar.
  SCIOLIST, smatterer, dabbler, half scholar; charlatan; wiseacre.
  NOVICE, tenderfoot; greenhorn (dupe) [See Dupe]; plebe or pleb [cant, U. S.]; tyro (learner) [See Learner]; lubber (bungler) [See Bungler]; fool [See Fool].
   ADJECTIVE:BOOKLESS, shallow, simple, lumpish, dull, dumb [colloq., U. S.], dense, crass, imbecile; wise in his own conceit; ignorant [See Ignorance].
  1. A wit with dunces and a dunce with wits.—Pope
  2. Oh! these deliberate fools!—Merchant of Venice