7
weird(adjective, strange, look like)
7
whopping(adjective, slang, big, large, enormous)
6
abysmal(adjective, awful, terrible, horrible, afraid)
6
cracking(adjective, large, huge)
6
cyclopean(adjective, big, giant)
6
depraved(adjective, adverb, evil, nasty, low)
6
devilish(adjective, shocking, unnatural)
6
diabolic(adjective, evil, fiendish)
6
dread(adjective, awful, terrible, horrible, afraid)
6
extensive(adjective, huge, vast, immense, massive)
6
extravagant(shocking, ridiculous, absurd, shameful, vulgarity)
6
frightening(adjective, awful, terrible, horrible, afraid)
6
gnarled(adjective, strange, look like)
6
grim(bad, awful, terrible, ugly, rotten)
6
harsh(adjective, great, severe, evil, nasty)
6
horrific(adjective, bad, great, nasty, awful)
6
intense(adjective, great, severe, wicked, extreme)
6
lurid(adjective, awful, terrible, immoral, atrocious)
6
merciless(adjective, severe, evil, nasty, harsh)
6
nightmarish(adjective, endured)
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APASmart Define. (2016). monstrous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/monstrous/thesaurus/synonyms
ChicagoSmart Define. 2016. "monstrous thesaurus" https://smartdefine.org/monstrous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, monstrous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/monstrous/thesaurus/synonyms>.
MLASmart Define. "monstrous thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/monstrous/thesaurus/synonyms>