6
dreadfully
6
horribly(adverb, terribly, dreadfully, appallingly)
6
terribly
5
awfully
4
frightfully
4
horridly
3
agonizingly(adverb, painfully)
3
appallingly(adverb, terribly, dreadfully)
3
distressingly(adverb, painfully, appallingly)
3
fearfully
3
gruesomely(adverb, appallingly)
3
hideously(adverb, dreadfully, appallingly)
3
tremendously
3
unbearably(adverb, painfully)
3
unpleasantly(adverb, painfully)
2
abominably
2
annoyingly(adverb, painfully)
2
cruelly(adverb, painfully)
2
direly
2
disagreeably(adverb, painfully)
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APASmart Define. (2015). horrendously thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/horrendously/thesaurus/synonyms
ChicagoSmart Define. 2015. "horrendously thesaurus" https://smartdefine.org/horrendously/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, horrendously thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/horrendously/thesaurus/synonyms>.
MLASmart Define. "horrendously thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/horrendously/thesaurus/synonyms>