Synonyms|382Antonyms|94|Broader|4Narrower|0Related|1.1k

15 entries under rigorous topic. ×

32
tough(adjective, hard, severe, rough, difficult)
30
hard(adjective, tough, severe, rough, difficult)
29
laborious(adjective, hard, severe, rough, difficult)
28
arduous(adjective, hard, tough, severe, rough)
28
difficult(adjective, hard, tough, rough, harsh)
27
trying(verb, adjective, hard, tough, severe)
26
severe(adjective, hard, tough, difficult, harsh)
20
rugged(adjective, hard, difficult, complex)
19
demanding(adjective, hard, tough, severe, rough)
13
exacting(adjective, hard, tough, severe, rough)
3
formidable(adjective, hard, tough, severe, rough)
3
harsh(adjective, hard, rough, difficult, cruel)
3
uphill(adjective, hard, severe, rough, difficult)
1
challenging(adjective, hard, tough, difficult, complex)
1
testing(adjective, tough, severe, difficult, violent)
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APASmart Define. (2015). taxing thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/taxing/thesaurus/synonyms
ChicagoSmart Define. 2015. "taxing thesaurus" https://smartdefine.org/taxing/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, taxing thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/taxing/thesaurus/synonyms>.
MLASmart Define. "taxing thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/taxing/thesaurus/synonyms>