44 entries under severe topic. ×

1
rigid(tough, painful, problematic, trying)
1
serious(adjective, hard, tough, rough)
1
unyielding(tough, painful, problematic, trying)
1
upstream(tough, painful, problematic, trying)
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APASmart Define. (2015). effortful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/effortful/thesaurus/synonyms
ChicagoSmart Define. 2015. "effortful thesaurus" https://smartdefine.org/effortful/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, effortful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/effortful/thesaurus/synonyms>.
MLASmart Define. "effortful thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/effortful/thesaurus/synonyms>