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

146 entries under strict topic. ×

1
uncompliant(adjective, hard, resolute, rigid, inflexible)
1
unpermissive(adjective, hard, tough, severe, rough)
1
unpleasant(adjective, tough, severe, harsh, cruel)
0
hard-and-fast(hard, resolute, rigid, inflexible)
0
staunch(hard, resolute, rigid, inflexible)
0
unswayable(hard, resolute, rigid, inflexible)
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APASmart Define. (2016). rigorous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms
ChicagoSmart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, rigorous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>.
MLASmart Define. "rigorous thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms>