Synonyms for Crack of dawn:

• n.

  •break of day (noun)
  • brightenings,
  • first flush of the morning,
  • first brightening,
  • prime of the morning,
  • peep of day.
  •dawn (noun)
  • break of day.
  •first light (noun)
  • Day-peep,
  • dawnlight,
  • cocklight,
  • flush of the morning,
  • half-light.

• Other synonyms:

  •n.
  • ante meridiem,
  • breakfast time,
  • dawn,
  • dawning,
  • daybreak,
  • dayspring,
  • first light,
  • forenoon,
  • morn,
  • morning,
  • morrow,
  • sunrise,
  • sunup,
  • Morningtide,
  • first blush,
  • forenoons,
  • morrows,
  • brights,
  • wee hours,
  • before noon,
  • early morning,
  • before lunch,
  • day peep,
  • early bright,
  • foreday,
  • wee hour,
  • first flush of morning,
  • first impression,
  • first sight.

Antonyms for Crack of dawn:

• n.

  • dawn
    end, evening, dusk, sundown, finish, eventide, darkness, sunset, setting, conclusion, ending.
  • morn
    night.