17
slowly
4
carefully
3
assiduously
2
delayed(adverb, agilely, unpremeditatedly)
2
deliberately
2
gradually
2
sluggishly
2
astutely
2
attentively
2
calculatingly
2
calmly
2
cautiously
2
chronically
2
circumspectly
2
comprehensively
2
conscientiously
2
contemplatively
2
contemporary
1
tardily
1
charily
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APASmart Define. (2015). hastily thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hastily/thesaurus/antonyms
ChicagoSmart Define. 2015. "hastily thesaurus" https://smartdefine.org/hastily/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, hastily thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hastily/thesaurus/antonyms>.
MLASmart Define. "hastily thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/hastily/thesaurus/antonyms>