Synonyms of the word

frightful

• adj. (obsolete) Full of fright, whether.
• adj. Full of something causing fright, whether.

alarming

• v. present participle of alarm.
• adj. causing apprehension, fear or alarm; frightening.

atrocious

• adj. Frightful, evil, cruel, or monstrous.
• adj. Offensive or heinous.
• adj. Very bad; abominable, disgusting.

awful

• adj. Oppressing with fear or horror; appalling, terrible.
• adj. (now rare) Inspiring awe; filling with profound reverence or respect; profoundly impressive.
• adj. Struck or filled with awe.
• adj. (obsolete) Terror-stricken.
• adj. Worshipful; reverential; law-abiding.
• adj. Exceedingly great; usually applied intensively.
• adj. Very bad.
• adv. (colloquial, US, Canada) Very, extremely.

bad

• adj. Not good; unfavorable; negative.
• adj. Not suitable or fitting.
• adj. Seemingly non-appropriate, in manners, etc.
• adj. Unhealthy.
• adj. Tricky; stressful; unpleasant.
• adj. Evil; wicked.
• adj. Faulty; not functional.
• adj. (of food) Spoiled, rotten, overripe.
• adj. (of breath) Malodorous, foul.
• adj. (informal) Bold and daring.
• adj. (hip-hop slang) good, superlative.
• adj. (of a need or want) Severe, urgent.
• adv. (now colloquial) Badly.
• n. (slang) Error, mistake.
• n. (countable, uncountable, economics) An item (or kind of item) of merchandise with negative value; an unwanted…
• adj. (slang) Fantastic.
• v. (archaic) Alternative past tense of bid. See bade.
• v. (Britain, dialect, transitive) To shell (a walnut).

extraordinary

• adj. Not ordinary; exceptional; unusual;.
• adj. Remarkably good.

fearful

• adj. Frightening.
• adj. (now rare) Frightened, filled with terror.
• adj. Tending to fear.
• adj. (dated) Terrible; shockingly bad.

horrible

• n. A thing that causes horror; a terrifying thing, particularly a prospective bad consequence asserted as…
• n. A person wearing a comic or grotesque costume in a parade of horribles.
• adj. Causing horror; terrible; shocking.
• adj. Tremendously bad.

horrifying

• v. present participle of horrify.
• adj. Tending to inspire horror; that horrifies; horrific.

terrible

• adj. Dreadful; causing alarm and fear.
• adj. Formidable, powerful.
• adj. Intense; extreme in degree or extent.
• adj. Unpleasant; disagreeable.
• adj. Very bad; lousy.

tremendous

• adj. awe-inspiring; terrific.
• adj. Notable for its size, power, or excellence.
• adj. Extremely large (in amount, extent, degree, etc.) or great.

ugly

• adj. Displeasing to the eye; not aesthetically pleasing.
• adj. Displeasing to the ear or some other sense.
• adj. Offensive to one's sensibilities or morality.
• adj. Ill-natured; crossgrained; quarrelsome.
• adj. Unpleasant; disagreeable; likely to cause trouble or loss.
• n. (slang, uncountable) Ugliness.
• n. (slang) An ugly person or thing.
• n. (Britain, informal, dated) A shade for the face, projecting from a bonnet.
• v. (transitive, nonstandard) To make ugly (sometimes with up).