Synonyms of dreadful in English:

dreadful


See US English definition of dreadful

See UK English definition of dreadful

See Spanish definition of espantoso

adjective

1‘a dreadful accident’

SYNONYMS
terrible, frightful, horrible, grim, awful, dire
frightening, terrifying, horrifying, alarming
distressing, shocking, appalling, harrowing
ghastly, fearful, hideous, horrendous, monstrous, unspeakable, gruesome, tragic, calamitous, grievous, grisly
archaic terrific
ANTONYMS

mild

2‘that dreadful woman’

SYNONYMS
unpleasant, disagreeable, nasty
frightful, shocking, awful, abysmal, atrocious, disgraceful, deplorable, wretched, very bad, lamentable, repugnant, odious
poor, inadequate, inferior, unsatisfactory, distasteful
informal hopeless, pathetic, useless, woeful, crummy, rotten, sorry, third-rate, lousy, godawful, not up to snuff, the pits, from hell
British informal duff, chronic, rubbish, pants, a load of pants, ropy, poxy
ANTONYMS

pleasant, agreeable

3‘you're a dreadful flirt’

SYNONYMS
outrageous, shocking
inordinate, immoderate, unrestrained
great, tremendous