ignis fatuus. Will-o'-the-wisp, Jack-with-a-lantern, [decoy].
ignoble, a. [humble], plebeian, untitled; [base], [dishonorable], [low].
ignominious, a. [dishonorable], [shameful], [infamous], disreputable.
ignominy, n. [disgrace], [dishonor], [reproach], obloquy, [shame], [humiliation].
ignoramus, n. [dunce], illiterate, sciolist, [wiseacre], dullard, [simpleton].
ignorance, n. illiteracy, inerudition, unenlightenment, nescience; [quackery], [charlatanry].
ignorant, a. illiterate, inerudite unenlightened, uninformed, unlearned, untaught, [uneducated], unlettered, nescient; [quackish], [charlatanic]. Antonyms: [educated], instructed, schooled, [trained], [proficient], [learned].
ignorantly, adv. [unknowingly], unconsciously, inadvertently, [unwittingly].
ignorant person. [ignoramus], illiterate.
ignore, v. [disregard], [slight], connive, [overlook].