Synonyms of frightening in English:

frightening


See US English definition of frightening

See UK English definition of frightening

See Spanish definition of espantoso

adjective

1‘she had many vivid and frightening dreams’

SYNONYMS
terrifying, horrifying, alarming, startling, shocking, chilling, spine-chilling, hair-raising, blood-curdling, appalling, disturbing, disconcerting, unnerving, intimidating, daunting, dismaying, upsetting, harrowing, traumatic
eerie, sinister, fearsome, dreadful, horrible, awful, nightmarish, monstrous, grim, gruesome, macabre, menacing
Scottish eldritch
informal scary, spooky, creepy, hairy
ANTONYMS

comforting