5
terrifying(adjective, awful, terrible, horrible, afraid)
4
alarming(adjective, fear)
4
beastly(adjective, awful, terrible, horrible, afraid)
4
calamitous(adjective, horrible, fearful)
4
cruel(adjective, awful, terrible, horrible, afraid)
4
wicked(adjective, awful, terrible, horrible, afraid)
3
abysmal(adjective, awful, terrible, horrible, afraid)
3
almighty(adjective, awful, terrible, horrible, afraid)
3
bad(adjective, awful, terrible, horrible, afraid)
3
blatant(adjective, awful, terrible, horrible, afraid)
3
chronic(adjective, awful, terrible, horrible, afraid)
3
crashing(adjective, awful, terrible, horrible, afraid)
3
damnable(adjective, awful, terrible, horrible, afraid)
3
darn(adjective, awful, terrible, horrible, afraid)
3
deuced(adjective, awful, terrible, horrible, afraid)
3
doggone(adjective, awful, terrible, horrible, afraid)
3
enormous(adjective, awful, terrible, horrible, afraid)
3
execrable(adjective, awful, terrible, horrible, afraid)
3
ferocious(adjective, awful, terrible, horrible, afraid)
3
flagitious(adjective, awful, terrible, horrible, afraid)
11 years ago|6.5k views|share |citing 
APASmart Define. (2015). direful thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/direful/thesaurus/synonyms
ChicagoSmart Define. 2015. "direful thesaurus" https://smartdefine.org/direful/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, direful thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/direful/thesaurus/synonyms>.
MLASmart Define. "direful thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/direful/thesaurus/synonyms>