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

146 entries under strict topic. ×

3
distinct(noun, correct, solid, perfect, exact)
3
drastic(adjective, severe, harsh, cruel, brutal)
3
effortful(adjective, tough, rough, difficult, harsh)
3
fierce(adjective, hard, tough, harsh, intense)
3
fixed(adjective, hard, severe, stiff, rigid)
3
heavy(adjective, strong, hard, tough, severe)
3
implacable(adjective, strong, hard, tough, harsh)
3
pitiless(adjective, hard, tough, severe, harsh)
3
ruthless(adjective, hard, tough, harsh, unpleasant)
3
specific(noun, correct, solid, perfect, exact)
3
toilsome(adjective, hard, tough, severe, rough)
3
tyrannical(adjective, hard, tough, harsh, cruel)
3
veracious(adjective, correct, right, appropriate, honest)
2
cold(adjective, tough, severe, harsh, cruel)
2
grinding(adjective, tough, severe, rough, difficult)
2
hard-nosed(adjective, strong, hard, tough, severe)
2
intractable(adjective, hard, resolute, rigid, inflexible)
2
intransigent(severe, stiff, inflexible, obstinate)
2
iron(hard, resolute, rigid, inflexible)
2
picky(adjective, tough, severe, fine, firm)
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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>