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

189 entries under severe topic. ×

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inordinate(adjective, stringent, drastic)
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no-nonsense(adjective, tough, firm, harsh)
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perverse(adjective, tough, harsh, grim)
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resentful(adjective, tough, harsh, grim)
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sober(thoughtful, serious, grim, cautious)
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testing(adjective, difficult, violent, awkward)
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undue(adjective, stringent, drastic)
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unjust(adjective, tough, harsh, grim)
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vexatious(adjective, harsh, unpleasant, heavy)
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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>