Synonyms for Terrible:

adj.

awful (adjective)
horrible, hideous, horrid, ghastly, dreadful, unpleasant, awful, repulsive, alarming, frightful, appalling, dire.
bad, horrible (adjective)
horrid, inconvenient, ghastly, disastrous, dread, awful, frightful, dreadful, repulsive, appalling, monstrous, unpleasant, fearful, desperate, offensive, disturbing, gruesome, hideous, atrocious, loathsome, severe, dire, dreaded, unfortunate, revolting, horrendous.
dangerous (adjective)
risky.
evil (adjective)
nefarious, calamitous, offensive, monstrous, revolting, wicked, heinous, repulsive, hideous, abominable, disgraceful, loathsome, foul, detrimental, sinister, baneful, destructive, atrocious, repellent, sinful, repugnant, evil, reprehensible, damnable, bad.
fearful (adjective)
unspeakable.
fearsome (adjective)
fearsome.
offensive (adjective)
offensive, embarrassing, atrocious, frightful.
severe (adjective)
bad.
wicked (adjective)
wicked.

n.

pitiful, formidable, redoubtable, scary, embarrassing, fear. harmful, desperate, violent, big, ruinous, fierce, perilous, strong, damaging, injurious, unsafe, vehement, risky, hazardous, furious. unfit, ill, failing, worse, infectious, unwell, unhealthy, fragile, frail, sick. terrible (noun)
awful, wicked, abominable, alarming, dread, direful, dreadful, painful, frightening, dreaded, fearsome, horrendous, bad, unspeakable, fearful, intense, severe, frightful, atrocious, horrific, dire.

Other synonyms:

fierce, upsetting, ill, heartbreaking, embarrassing, scary, depressing, unhappy, unfortunate. vehement, pitiful. furious. sad. violent. catastrophic
tragic.
formidable
redoubtable.

Usage examples for terrible

  1. Her mother was a really terrible person. – The Man Who Could Not Lose by Richard Harding Davis
  2. It would have been terrible to have seen her taken far away- my sweet little mother. – Lucy Maud Montgomery Short Stories, 1907 to 1908 by Lucy Maud Montgomery
  3. It seemed terrible to wait, when here before her was news of David, of life or death. – The Weavers, Complete by Gilbert Parker Last Updated: March 14, 2009