Terrifyingly is an adverb that describes something that is extremely frightening. If you are searching for some synonyms for this word, you can use words like dreadfully, horrifyingly, alarmingly, shockingly, petrifyingly, frighteningly, chillingly, and intimidatingly. These synonyms will help you to express your emotions when you want to describe someone, something, or a situation that is exceedingly scary. For instance, "the terrifyingly dark forest" can be rewritten as "the petrifyingly dense forest," "the alarmingly shadowy forest," or "the chillingly eerie forest." Using synonyms for terrifyingly can enrich your writing and make your descriptions more colorful and vivid.