- Sage (Substantives), wise man, savant, expert, luminary, adept, authority.
- Fool (Substantives), blockhead, idiot, tom-fool, wiseacre (ironically), simpleton, witling, ass, goose, ninny, dolt, booby, noodle, muff, mug, muggins, juggins, owl, cuckoo, numskull, noddy, goose-cap, half-wit, imbecile, ninnyhammer, badeau, driveller, idiot, cretin, natural, lack-brain, niais, child, infant, baby, innocent, greenhorn, zany, dunce, lout, loon, oaf, lown, dullard, duffer, doodle, calf, colt, buzzard, block, stick, stock, numps, clod-poll, clot-poll, cold-hopper, clod, lubber, bull-calf, bull-head, fat-head, thick-skull, dunderhead, addle-head, dizzard, hoddydoddy, looby, nincompoop, a poor head, un sot à triple étage, loggerhead, sot, jolthead, shallow-brain, jobbernowl, changeling, dotard, driveller, moon-calf, giddy-head, gobe-mouche, rantipole, muddler, stick-in-the-mud, old woman, April fool, Cyclops.
- Sanity (Substantives), rationality, being in one's senses, in one's right mind, in one's sober senses; sobriety, lucidity, lucid interval.
- Insanity (Substantives), lunacy, madness, unsoundness, derangement, psychosis, alienation, aberration, dementia, paranoia, mania, calenture, frenzy, raving, monomania, megalomania, disordered intellect, incoherence, wandering, delirium, hallucination, lycanthropy, vertigo, dizziness, swimming, dementation; Bedlam.
Wild, giddy, thoughtless, eccentric, odd, extravagant, quixotic, light-headed, rantipole, high-flying, crack- brained, cracked, cranky, hare-brained, scatter-brained, scatterpated, unballasted, ridiculous, frivolous, balmy.
Applied to actions: Foolish, unwise, injudicious, improper, imprudent, unreasonable, nonsensical, absurd, ridiculous, silly, stupid, asinine, ill-imagined, ill-advised, ill-judged, ill-devised, tactless, inconsistent, irrational, unphilosophical, extravagant, preposterous, egregious, imprudent, indiscreet, improvident, impolitic, improper 645, 647, footling.
(Phrases). Without rhyme or reason; penny-wise and pound-foolish.
Oracle, a shining light, esprit fort, intellectual, high-brow, pundit, academist, academician, philomath, schoolman, magi, a Magnus Apollo, a Solomon, Nestor, Solon, a second Daniel.
(Epithets). Venerable, reverend, authoritative.
(Phrase). "A Daniel come to judgment."
(Ironically). Wiseacre, big-wig.
(Phrases). One who is not likely to set the Thames on fire; one who did not invent gunpowder; one who is no conjuror; qui n'a pas inventé la poudre; who could not say "Boh" to a goose; one with his upper story to let.
Men of Gotham; men of Bœotia.
(Verbs). To be sane, etc., to retain one's senses, reason, etc.
To become sane, come to one's senses, sober down.
To render sane, bring to one's senses, to sober.
(Adjectives). Sane, rational, reasonable, compos, in one's sober senses, in one's right mind, sober- minded.
(Adverbs). Sanely, soberly, etc.
(Verbs). To be or become insane, etc., to lose one's senses, wits, reason, faculties, etc., to run mad, run amuck, go off one's head, rave, dote, ramble, wander, drivel.
(Phrases). Battre la campagne; avoir le diable au corps.