5
alarmingly
5
scarily
3
appallingly(adverb, terrifyingly, horrifically)
3
dauntingly(adverb, formidably, intimidatingly)
3
horrifyingly(adverb, appallingly, terrifyingly, horrifically)
3
intimidatingly(adverb, formidably)
3
startlingly
2
terrifyingly(adverb, appallingly, horrifically)
2
dismayingly(adverb, formidably, intimidatingly)
2
disturbingly
2
dreadfully(adverb, shockingly, repulsively, revoltingly)
2
scaredly
2
terrifiedly
2
threateningly(adverb, threateningly)
1
admonishingly(adverb, threateningly)
1
affrightedly
1
alarmedly
1
amazingly
1
annoyance
1
appalledly
<123458>
11 years ago|2.4k views|share |citing 
APASmart Define. (2015). frighteningly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/frighteningly/thesaurus/synonyms
ChicagoSmart Define. 2015. "frighteningly thesaurus" https://smartdefine.org/frighteningly/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, frighteningly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/frighteningly/thesaurus/synonyms>.
MLASmart Define. "frighteningly thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/frighteningly/thesaurus/synonyms>