petrifying Synonyms

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