petrifying Synonyms

unnerving stunning sinister shocking scary scaring paralyzing menacing lapidify intimidating horrifying stupefying terrible spine-tingling paralysing blood-curdling spooky hair-raising bloodcurdling scariest scarier threatening terrifying horrendous harrowing hardening dread disturbing dismaying dire daunting creepy chilling astounding astonishing appalling dreadful eerie hairy grim gruesome frightful frightening fossilizing formidable forbidding fearsome fearful alarming