Definition for Calamitous:

• Marked by causing, calamity. Hence calamitously adv. [ French]

Synonyms for Calamitous:

• adj.

  •adverse (adjective)
  • inauspicious,
  • troublesome,
  • unfriendly,
  • difficult,
  • adverse,
  • burdensome,
  • hard,
  • miserable,
  • opposing,
  • antipathetic,
  • unpropitious,
  • detrimental,
  • distressful,
  • perilous.
  •baneful (adjective)
  • contagious,
  • cursed,
  • ill,
  • poisonous,
  • infectious,
  • wicked,
  • cancerous.
  •deplorable (adjective)
  • opprobrious.
  •destructive (adjective)
  • deleterious,
  • injurious,
  • damaging,
  • Wreckful,
  • deadly.
  •disappointing (adjective)
  • heartbreaking.
  •disastrous; tragic (adjective)
  • afflictive,
  • messy,
  • pernicious,
  • Blighting.
  •evil (adjective)
  • damnable,
  • sinful,
  • reprehensible,
  • repellent,
  • heinous,
  • monstrous,
  • repulsive,
  • atrocious,
  • disgraceful,
  • foul,
  • sinister,
  • nefarious,
  • bad,
  • terrible,
  • repugnant,
  • loathsome,
  • abominable,
  • hideous,
  • revolting,
  • offensive.
  •fateful (adjective)
  • hellfire.
  •harmful (adjective)
  • mischievous.

• n.

  •
  • dangerous,
  • hazardous,
  • risky,
  • unsafe.
  •
  • help.

Antonyms for Calamitous:

• adj.

  • disastrous; tragic
    favorable, helpful, blessed, nice, unimportant, lucky, wonderful, joyous, good, comforting, happy, harmless, trivial, advantageous, fortunate, wholesome, healthful.
  • Other antonyms:
    fair, ameliorative, nonfatal, innocuous, useful, optimistic, healthful, innocent, inoffensive, creative, upbeat, harmless, rosy, rose-colored, formative, productive, nonlethal, healthy, encouraging, constructive, preservative, helpful, salubrious, nondestructive, wholesome, protective.