35 entries under dreadful topic. ×

9
gruesome(adjective, awful, terrible)
8
appalling(adjective, tough, difficult, awful, terrible)
8
terrible(adjective, tough, difficult, awful, fear)
8
ghastly(adjective, awful, terrible, fear)
7
frightful(adjective, tough, difficult, awful, terrible)
7
horrible(adjective, tough, difficult, awful, terrible)
7
horrific(adjective, tough, difficult, awful, terrible)
6
awful(tough, difficult, terrible, fear)
6
tremendous(adjective, tough, difficult, awful, terrible)
6
grim(awful, terrible, ominous)
6
grisly(awful, terrible, strange, horrifying)
6
horrendous(adjective, awful, terrible)
5
hideous(adjective, awful, terrible)
4
ghoulish(awful, terrible)
4
shocking(adjective, tough, difficult, awful, terrible)
3
lurid(adjective, awful, terrible, strange)
2
astounding(awful, terrible, strange, horrifying)
2
hair-raising(awful, terrible)
2
horrifying(awful, terrible, strange)
2
macabre(awful, terrible)
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APASmart Define. (2016). redoubtable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/redoubtable/thesaurus/synonyms
ChicagoSmart Define. 2016. "redoubtable thesaurus" https://smartdefine.org/redoubtable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, redoubtable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/redoubtable/thesaurus/synonyms>.
MLASmart Define. "redoubtable thesaurus" 2 March 2016. Web. 22 September 2026. <https://smartdefine.org/redoubtable/thesaurus/synonyms>