174 entries under adjective topic. ×

1
mortified(strong, hard, tough, severe)
1
mulish(strong, hard, tough, severe)
1
noncooperative
1
obstinate
1
rancorous
1
relentless(strong, hard, tough, severe)
1
rigid(strong, hard, tough, severe)
1
rigorous(strong, hard, tough, severe)
1
steely(strong, hard, tough, severe)
1
stiff-necked(strong, hard, tough, severe)
1
tough(strong, hard, severe, harsh)
1
uncooperative
1
unfriendly
1
ungenial
1
unrelenting(strong, hard, tough, severe)
1
unsociable
1
unsparing(strong, hard, tough, severe)
1
upset(evil, hostile, mysterious, surly)
0
Delphian(evil, mysterious, threatening, nefarious)
0
abstruse(evil, mysterious, threatening, nefarious)
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APASmart Define. (2015). frowning thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/frowning/thesaurus/synonyms
ChicagoSmart Define. 2015. "frowning thesaurus" https://smartdefine.org/frowning/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, frowning thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/frowning/thesaurus/synonyms>.
MLASmart Define. "frowning thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/frowning/thesaurus/synonyms>