2
formal(adjective, strong, cold, stiff, affected)
2
foul
2
freak(extraordinary, unusual, wild, strange, crazy)
2
frightening(awful, terrible, grim, shocking, upsetting)
2
gargantuan
2
ghastly(adjective, strange, shocking, odd, pale)
2
ghostlike(supernatural, weird, paranormal, spooky, mystic)
2
ghoulish(awful, terrible, grim, shocking, upsetting)
2
grim(awful, shocking, upsetting, frightening, horrifying)
2
grisly(awful, terrible, immoral, grim, shocking)
2
gruesome(awful, immoral, grim, shocking, atrocious)
2
hair-raising(shocking, upsetting, frightening)
2
hard(adjective, evil, nasty, harsh, vicious)
2
heteroclite(extraordinary, unusual, strange, exceptional, usual)
2
heteromorphic(extraordinary, strange, exceptional, irregular, nonstandard)
2
horrendous(awful, terrible, immoral, grim, shocking)
2
horrible(awful, immoral, grim, shocking, atrocious)
2
horrid(awful, terrible, grim, shocking, upsetting)
2
horrific(strange, immoral, shocking, odd, atrocious)
2
horrifying(awful, terrible, immoral, grim, shocking)
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APASmart Define. (2016). unnatural thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unnatural/thesaurus/synonyms
ChicagoSmart Define. 2016. "unnatural thesaurus" https://smartdefine.org/unnatural/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unnatural thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unnatural/thesaurus/synonyms>.
MLASmart Define. "unnatural thesaurus" 30 March 2016. Web. 29 September 2026. <https://smartdefine.org/unnatural/thesaurus/synonyms>