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

Class V. Words Releasing to the Voluntary Powers
Division (I) Individual Volition
Section II. Prospective Volition
3. Contingent Subservience

668. Warning.

   NOUN:WARNING, caution, caveat; notice (information) [See Notch]; premonition, premonishment [rare]; prediction [See Prediction]; symptom, contraindication, lesson, dehortation; admonition, monition; alarm [See Alarm].
  handwriting on the wall, tekel upharsin [Heb.], yellow flag; red flag, red light, fogsignal, fog-horn; siren; monitor, warning voice, Cassandra, signs of the times, Mother Cary’s chickens, stormy petrel, bird of ill omen, gathering clouds, cloud no bigger than a man’s hand, clouds in the horizon, death watch, death lights (premonitions) [See Psychical Research]
  WATCHTOWER, beacon, signal post; lighthouse (indication of locality) [See Indication].
  SENTINEL, sentry; watch, watchman; watch and ward; watchdog, bandog, house dog; patrol, vedette, picket, bivouac, scout, spy, spial [obs.]; advanced -, rear-guard; lookout, flagman.
  CAUTIOUSNESS [See Caution].
   VERB:WARN, caution; forewarn, prewarn; admonish, forebode, premonish [rare]; give -notice, – warning; menace (threaten) [See Threat]; put on one’s guard; sound the alarm [See Alarm]; croak.
  BEWARE, ware [dial.]; take -warning, – heed at one’s peril; look out, keep one’s wits about one; keep watch and ward (care) [See Care].
   ADJECTIVE:WARNING &c. v.; premonitory, monitory, cautionary, admonitory, admonitive [rare]; ominous, threatening, lowering, minatory (threat) [See Threat]; symptomatic, sematic [biol.].
  WARNED &c. v.; on one’s guard (careful) [See Care], (cautious) [See Caution].
   ADVERB:with alarm, on guard, after due warning, with one’s eyes open; in terrorem [L.].
   INTERJECTION:BEWARE! ware! take care! mind -, take care- what you are about! mind! look out! watch your step!    QUOTATIONS:
  1. Ne reveillez pas le chat qui dort.
  2. Fanum habet in cornu.
  3. Caveat actor.
  4. Le silence du peuple est la leçon des rois.
  5. Verbum sat sapienti.
  6. Un averti en vaut deux.
  7. By the pricking of my thumbs, Something wicked this way comes.—Macbeth
  8. Cold-pausing Caution’s lesson scorning.—Burns