16 entries under closely topic. ×

7
thoroughly(adverb, absolutely, fully, quite)
7
assiduously(adverb, thoroughly, fully, vigorously)
7
diligently(adverb, thoroughly, seriously, vigorously)
7
industriously(adverb, thoroughly, seriously, vigorously)
4
exhaustively(adverb, absolutely, very, thoroughly, fully)
3
unremittingly(adverb, thoroughly, fully, vigorously)
2
hard(adverb, very, thoroughly, fully, completely)
2
persistently(adverb, thoroughly, seriously, vigorously)
2
strenuously(adverb, thoroughly, seriously, vigorously)
1
doggedly(adverb, thoroughly, sharply, meticulously)
1
intensively(adverb, very, thoroughly, fully, completely)
1
intently(adverb, thoroughly, carefully, sharply)
1
searchingly(adverb, thoroughly, carefully, sharply)
1
steadily(adverb, thoroughly, sharply, meticulously)
1
untiringly(adverb, thoroughly, sharply, meticulously)
1
with determination(expression, adverb, thoroughly, sharply)
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APASmart Define. (2015). painstakingly thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/painstakingly/thesaurus/synonyms
ChicagoSmart Define. 2015. "painstakingly thesaurus" https://smartdefine.org/painstakingly/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, painstakingly thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/painstakingly/thesaurus/synonyms>.
MLASmart Define. "painstakingly thesaurus" 19 June 2015. Web. 24 September 2026. <https://smartdefine.org/painstakingly/thesaurus/synonyms>