Synonyms|1kAntonyms|253|Broader|5Narrower|1Related|546

443 entries under adjective topic. ×

2
defined(close, correct, solid, exact)
2
desperate
2
difficile(tough, rough, difficult, heavy)
2
dire(unpleasant, vicious, painful, distressing)
2
errorless(correct, true)
2
excessive(severe, difficult, harsh, heavy)
2
exorbitant(severe, stringent, drastic)
2
extravagant(severe, stringent, drastic)
2
ferocious(harsh, cruel, determined, fierce)
2
great(severe, stringent, drastic)
2
grinding(tough, severe, rough, difficult)
2
gruff
2
hairy(tough, severe, rough, difficult)
2
hard-core(strong, hard, tough, severe)
2
hard-nosed(strong, hard, tough, severe)
2
hard-shell(strong, hard, tough, severe)
2
hostile(tough, severe, harsh, grim)
2
hypercritical
2
immoderate(severe, stringent, drastic)
2
inhuman(hard, tough, harsh, cruel)
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APASmart Define. (2016). rigorous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms
ChicagoSmart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, rigorous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>.
MLASmart Define. "rigorous thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms>