8
finicky(adjective, character, behavior, thorough, meticulous)
8
laborious(adjective, hardworking)
8
punctual(adjective, characteristic, time, quality, speed)
8
time-consuming
7
detailed(adjective, close, complete, tough, fancy)
7
methodical(adjective, organized)
7
rigid
7
severe
7
strict(adjective, harsh, exact, careful, regular)
6
attentive(adjective, careful, thorough, meticulous, industrious)
6
demanding
6
indefatigable(adjective, activity, untiring)
6
studious
6
thoroughgoing(adjective, thorough, meticulous)
5
assiduousness(noun, activity, conscientiousness, meticulousness, fussiness)
5
cautious(adjective, careful, thorough, scrupulous)
5
diligence(noun, activity, care, conscientiousness, assiduousness)
5
intricate(adjective, complex, involved, complicated, detailed)
5
laboured(adjective, complicated)
5
minute(adjective, close, complete, tough, fancy)
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APASmart Define. (2016). painstaking thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/painstaking/thesaurus/synonyms
ChicagoSmart Define. 2016. "painstaking thesaurus" https://smartdefine.org/painstaking/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, painstaking thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/painstaking/thesaurus/synonyms>.
MLASmart Define. "painstaking thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/painstaking/thesaurus/synonyms>