4
abominable(adjective, dull, bad, plain, awful)
4
debilitating(adjective, dull, bad, plain, terrible)
4
demoralizing(adjective, dull, bad, plain, terrible)
4
dire(adjective, dull, bad, plain, terrible)
4
discouraging(adjective, dull, bad, plain, terrible)
4
disheartening(adjective, dull, bad, plain, terrible)
4
dispiriting(adjective, dull, bad, plain, terrible)
4
exhausting(adjective, dull, bad, plain, terrible)
4
frightful(adjective, dull, bad, plain, terrible)
4
inferior(adjective, feature, dull, bad, poor)
4
low-grade(adjective, dull, bad, plain, terrible)
4
unexceptional(adjective, feature, dull, bad, poor)
3
abysmal(adjective, dull, bad, plain, terrible)
3
calamitous(adjective, dull, bad, plain, terrible)
3
devastating(adjective, dull, bad, plain, terrible)
3
dismal(adjective, dull, bad, plain, terrible)
3
excruciating(adjective, dull, bad, plain, terrible)
3
fearful(adjective, dull, bad, plain, terrible)
3
grim(adjective, dull, bad, plain, terrible)
3
heinous(adjective, dull, bad, plain, terrible)
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APASmart Define. (2016). wonderful thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/wonderful/thesaurus/antonyms
ChicagoSmart Define. 2016. "wonderful thesaurus" https://smartdefine.org/wonderful/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2016, wonderful thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/wonderful/thesaurus/antonyms>.
MLASmart Define. "wonderful thesaurus" 29 March 2016. Web. 30 September 2026. <https://smartdefine.org/wonderful/thesaurus/antonyms>